PART I: Neurons and the Nerve Impulse

Size: px
Start display at page:

Download "PART I: Neurons and the Nerve Impulse"

Transcription

1

2 PART I: Neurons and the Nerve Impulse

3 Identify each of the labeled structures of the neuron below. A. B. C. D. E. F. G.

4 Identify each of the labeled structures of the neuron below. A. dendrites B. nucleus C. cell body D. axon E. axon endings F. nodes of Ranvier G. Schwann cells/myelin sheath

5 Fill in the blanks in the sentences below with the NAME of the STRUCTURE of a NEURON that provides the described FUNCTION. The of a neuron contains the DNA and is the control center of the cell. The of a neuron contains the nucleus and most of the cellular organelles.

6 Fill in the blanks in the sentences below with the NAME of the STRUCTURE of a NEURON that provides the described FUNCTION. The nucleus of a neuron contains the DNA and is the control center of the cell. The cell body of a neuron contains the nucleus and most of the cellular organelles.

7 Fill in the blanks in the sentence below with the NAME of the STRUCTURE of a NEURON that provides the described FUNCTION. Signals come in to the neuron through the, and travel out of the neuron along the, at the end of which the contact the next neuron in the communication chain.

8 Fill in the blanks in the sentence below with the NAME of the STRUCTURE of a NEURON that provides the described FUNCTION. Signals come in to the neuron through the dendrites, and travel out of the neuron along the axon, at the end of which the axon endings contact the next neuron in the communication chain.

9 Neurotransmitters are contained in that are located in the of a neuron. A. vesicles; axon endings B. axon endings; dendrites C. calcium ions (Ca 2+ ); synapses D. cell membranes; synaptic gaps

10 Neurotransmitters are contained in that are located in the of a neuron. A. vesicles; axon endings B. axon endings; dendrites C. calcium ions (Ca 2+ ); synapses D. cell membranes; synaptic gaps

11 Neurotransmitters are that travel across a to another neuron. a. electrical signals; receptor b. electrical signals; synapse c. chemical signals; receptor d. chemical signals; synapse

12 Neurotransmitters are that travel across a to another neuron. a. electrical signals; receptor b. electrical signals; synapse c. chemical signals; receptor d. chemical signals; synapse

13 Generally, neural impulses travel: A. electrically between and within each neuron B. chemically between and within each neuron. C. electrically between neurons and chemically within each neuron. D. chemically between neurons and electrically within each neuron.

14 Generally, neural impulses travel: A. electrically between and within each neuron B. chemically between and within each neuron. C. electrically between neurons and chemically within each neuron. D. chemically between neurons and electrically within each neuron. The ELECTRICAL SIGNAL of neurons is an action potential which travels WITHIN a single neuron from the dendrite and out along the axon. At the axon endings, this action potential activates the release of neurotransmitters, which are CHEMICAL SIGNALS, into the synapse BETWEEN two neurons.

15 Which of the following types of molecules are the major structural components of the cell membrane? a) phospholipids and cellulose b) nucleic acids and proteins c) phospholipids and proteins d) proteins and cellulose

16 Which of the following types of molecules are the major structural components of the cell membrane? a) phospholipids and cellulose b) nucleic acids and proteins c) phospholipids and proteins d) proteins and cellulose

17 Plasma membranes are selectively permeable. This statement means that a) No substances can enter or exit the cell through the plasma membrane. b) The plasma membrane allows some substances to enter or exit a cell more easily than others. c) All substances are able to enter or exit the cell through the plasma membrane. d) It is random chance whether a molecule can or cannot enter or exit the cell through the plasma membrane.

18 Plasma membranes are selectively permeable. This statement means that a) No substances can enter or exit the cell through the plasma membrane. b) The plasma membrane allows some substances to enter or exit a cell more easily than others. c) All substances are able to enter or exit the cell through the plasma membrane. d) It is random chance whether a molecule can or cannot enter or exit the cell through the plasma membrane.

19 What kinds of molecules pass through the cell membrane most easily? a) ions b) small and hydrophobic c) large and hydrophobic d) small and polar e) large and polar

20 What kinds of molecules pass through the cell membrane most easily? a) ions b) small and hydrophobic c) large and hydrophobic d) small and polar e) large and polar

21 1. For each of following molecules, indicate whether it CAN or CANNOT pass through the phospholipid bilayer of the plasma membrane by simple diffusion. 2. Then, for EACH molecule EXPLAIN WHY it can or cannot pass through based upon the SIZE and CHARGE characteristics of the molecule. A. CO 2 : B. O 2 : C. H 2 O: D. C 6 H 12 O 6 : E. K + : F. Na + : G. Ca 2+ :

22 1. For each of following molecules, indicate whether it CAN or CANNOT pass through the phospholipid bilayer of the plasma membrane by simple diffusion. 2. Then, for EACH molecule EXPLAIN WHY it can or cannot pass through based upon the SIZE and CHARGE characteristics of the molecule. A. CO 2 : YES! It CAN! It s both SMALL and NONPOLAR (hydrophobic)! B. O 2 : YES! It CAN! It s both SMALL and NONPOLAR (hydrophobic)! C. H 2 O: WATER!!! NO! It CANNOT! Yes, it s SMALL, but it is POLAR (hydrophilic)! D. C 6 H 12 O 6 : GLUCOSE!!! NO! It CANNOT! It s both LARGE and POLAR (hydrophilic)! E. K + : NO! It CANNOT! Yes, it s SMALL, but it is an ION with a CHARGE (hydrophilic)! F. Na + : NO! It CANNOT! Yes, it s SMALL, but it is an ION with a CHARGE (hydrophilic)! G. Ca 2+ : NO! It CANNOT! Yes, it s SMALL, but it is an ION with a CHARGE (hydrophilic)!

23 Which of the following statements regarding diffusion is FALSE? a) Diffusion is a result of the thermal energy of atoms and molecules. b) Diffusion requires no input of energy into the system. c) Diffusion occurs when particles spread from areas where they are less concentrated to areas where they are more concentrated. d) Diffusion occurs even after equilibrium is reached and no net change is apparent.

24 Which of the following statements regarding diffusion is FALSE? a) Diffusion is a result of the thermal energy of atoms and molecules. b) Diffusion requires no input of energy into the system. c) Diffusion occurs when particles spread from areas where they are less concentrated to areas where they are more concentrated. d) Diffusion occurs even after equilibrium is reached and no net change is apparent. Statement c above is FALSE: In reality diffusion occurs when particles spread from areas where they are MORE concentrated to areas where they are LESS concentrated, in other words from HIGH to LOW concentration.

25 Water moves in and out of cells by the process of a) Passive diffusion b) Osmosis c) Active transport d) Phagocytosis

26 Water moves in and out of cells by the process of a) Passive diffusion b) Osmosis c) Active transport d) Phagocytosis

27 When two aqueous solutions that differ in solute concentration are placed on either side of a semi- permeable membrane and osmosis is allowed to take place, the water will a) exhibit a net movement to the side with lower free water concentration. b) exhibit a net movement to the side with higher free water concentration. c) exhibit a net movement to the side with lower solute concentration. d) exhibit an equal movement in both directions across the membrane.

28 When two aqueous solutions that differ in solute concentration are placed on either side of a semi- permeable membrane and osmosis is allowed to take place, the water will a) exhibit a net movement to the side with lower free water concentration. b) exhibit a net movement to the side with higher free water concentration. c) exhibit a net movement to the side with lower solute concentration. d) exhibit an equal movement in both directions across the membrane.

29 The diagram to the right represents a plant cell in distilled water as seen with a compound light microscope. Which diagram below best represents the appearance of that cell after it has been placed in a 15% salt solution for two minutes? A. 1 B. 2 C. 3 D. 4

30 The diagram to the right represents a plant cell in distilled water as seen with a compound light microscope. Which diagram below best represents the appearance of that cell after it has been placed in a 15% salt solution for two minutes? This is a high salt concentration solution, therefore a hypertonic solution. Water will move OUT of the cell, causing it to shrink within its plasma membrane, but the cell wall (a rigid structure) will maintain it s shape, a situation shown in (3) below. A. 1 B. 2 C. 3 D. 4

31 Which of the following statements regarding active transport is FALSE? a) Active transport uses ATP as an energy source. b) Active transport can move a solute against its concentration gradient. c) Active transport requires the cell to expend energy. d) Active transport is driven by the potential energy represented by a concentration gradient.

32 Which of the following statements regarding active transport is FALSE? a) Active transport uses ATP as an energy source. b) Active transport can move a solute against its concentration gradient. c) Active transport requires the cell to expend energy. d) Active transport is driven by the potential energy represented by a concentration gradient. ATP is an energy source that drives active transport, active transport can move a solute against its concentration gradient (meaning move it from LOW to HIGH concentration), and requires the cell to expend energy (usually in the form of ATP). Only d is FALSE.

33 Which of the following statements about the sodium- potassium pump (SHOWN BELOW) is FALSE? a) Sodium ions in the cytoplasm and an ATP molecule bind to the carrier protein on the cytoplasmic side of the cell membrane. b) ATP is broken down into ADP and potassium to supply the energy. c) The carrier protein changes shape as it transports ions from the cytoplasm to the extracellular fluid. d) The ions from inside the cell are transported across the cell membrane. e) The ions are then released into the extracellular fluid outside the cell.

34 Which of the following statements about the sodium- potassium pump (SHOWN BELOW) is FALSE? a) Sodium ions in the cytoplasm and an ATP molecule bind to the carrier protein on the cytoplasmic side of the cell membrane. b) ATP is broken down into ADP and potassium to supply the energy. c) The carrier protein changes shape as it transports ions from the cytoplasm to the extracellular fluid. d) The ions from inside the cell are transported across the cell membrane. e) The ions are then released into the extracellular fluid outside the cell.

35 The sodium- potassium pump (SHOWN BELOW) functions to move a) 2 sodium ions out of the cell and 3 potassium ions into the cell. b) 2 sodium ions into of the cell and 3 potassium ions out of the cell. c) 3 sodium ions out of the cell and 2 potassium ions into the cell. d) 3 sodium ions into of the cell and 2 potassium ions out of the cell.

36 The sodium- potassium pump (SHOWN BELOW) functions to move a) 2 sodium ions out of the cell and 3 potassium ions into the cell. b) 2 sodium ions into of the cell and 3 potassium ions out of the cell. c) 3 sodium ions out of the cell and 2 potassium ions into the cell. d) 3 sodium ions into of the cell and 2 potassium ions out of the cell.

37 The function of the sodium- potassium establishes two concentration gradients across the plasma membrane of neuron, such that sodium ion concentration is high the cell and potassium ion concentration is high the cell. a) inside; inside b) inside; outside c) outside; inside d) outside; outside

38 The function of the sodium- potassium establishes two concentration gradients across the plasma membrane of neuron, such that sodium ion concentration is high the cell and potassium ion concentration is high the cell. a) inside; inside b) inside; outside c) outside; inside d) outside; outside

39 The function of the sodium- potassium establishes the resting membrane potential of a neuron, in which the outside of the cell has a charge, and the inside of the cell has a charge. a. positive; positive b. positive; negative c. negative; positive d. negative; negative

40 The function of the sodium- potassium establishes the resting membrane potential of a neuron, in which the outside of the cell has a charge, and the inside of the cell has a charge. a. positive; positive b. positive; negative c. negative; positive d. negative; negative

41 Identify each of the labeled phases of an action potential of a neuron as shown in the graph to the right. A. B. C. D. E.

42 Identify each of the labeled phases of an action potential of a neuron as shown in the graph to the right. A. Resting Membrane Potential B. Depolarization C. Repolarization D. Hyperpolarization or Undershoot E. Threshold

43 The part of the curve labeled A is MOST DIRECTLY the result of the activity of a) the sodium- potassium pump. b) voltage- gated Na + channels. c) ligand- gated ion channels. d) voltage- gated K + channels. e) voltage- gated Ca 2+ channels.

44 The part of the curve labeled A is MOST DIRECTLY the result of the activity of a) the sodium- potassium pump. b) voltage- gated Na + channels. c) ligand- gated ion channels. d) voltage- gated K + channels. e) voltage- gated Ca 2+ channels.

45 The part of the curve labeled B is MOST DIRECTLY the result of the activity of a) the sodium- potassium pump. b) voltage- gated Na + channels. c) ligand- gated ion channels. d) voltage- gated K + channels. e) voltage- gated Ca 2+ channels.

46 The part of the curve labeled B is MOST DIRECTLY the result of the activity of a) the sodium- potassium pump. b) voltage- gated Na + channels. c) ligand- gated ion channels. d) voltage- gated K + channels. e) voltage- gated Ca 2+ channels.

47 The part of the curve labeled C is MOST DIRECTLY the result of the activity of a) the sodium- potassium pump. b) voltage- gated Na + channels. c) ligand- gated ion channels. d) voltage- gated K + channels. e) voltage- gated Ca 2+ channels.

48 The part of the curve labeled C is MOST DIRECTLY the result of the activity of a) the sodium- potassium pump. b) voltage- gated Na + channels. c) ligand- gated ion channels. d) voltage- gated K + channels. e) voltage- gated Ca 2+ channels.

49 The part of the curve labeled D is MOST DIRECTLY the result of the activity of a) the sodium- potassium pump. b) voltage- gated Na + channels. c) ligand- gated ion channels. d) voltage- gated K + channels. e) voltage- gated Ca 2+ channels.

50 The part of the curve labeled D is MOST DIRECTLY the result of the activity of a) the sodium- potassium pump. b) voltage- gated Na + channels. c) ligand- gated ion channels. d) voltage- gated K + channels. e) voltage- gated Ca 2+ channels.

51 Which of the following statements about is TRUE about the phase of the curve labeled B? a) The cell membrane of the neuron is becoming repolarized. b) K + ions are moving out of the cell as voltage- gated K + - channels open. c) Na + ions are moving into the cell as voltage- gated Na + - channels open. d) The sodium- potassium pump stops functioning because the carrier protein becomes denatured. e) None of the above.

52 Which of the following statements about is TRUE about the phase of the curve labeled B? a) The cell membrane of the neuron is becoming repolarized. b) K + ions are moving out of the cell as voltage- gated K + - channels open. c) Na + ions are moving into the cell as voltage- gated Na + - channels open. d) The sodium- potassium pump stops functioning because the carrier protein becomes denatured. e) None of the above.

53 Which of the following statements about is TRUE about the phase of the curve labeled C? a) The cell membrane of the neuron is becoming repolarized. b) K + ions are moving out of the cell as voltage- gated K + - channels open. c) Most of the voltage- gated Na + channels are closed. d) The outside of the cell membrane now has a positive charge (+) while the inside has a negative charge (- ) e) All of the above.

54 Which of the following statements about is TRUE about the phase of the curve labeled C? a) The cell membrane of the neuron is becoming repolarized. b) K + ions are moving out of the cell as voltage- gated K + - channels open. c) Most of the voltage- gated Na + channels are closed. d) The outside of the cell membrane now has a positive charge (+) while the inside has a negative charge (- ) e) All of the above.

55 Once an action potential has been fired, the neuron cannot fire again until: a) the resting membrane potential has been restored. b) the rising phase of the action potential has reached its peak. c) the reuptake of neurotransmitters has been blocked. d) the direction of the nerve impulse within the axon has been reversed.

56 Once an action potential has been fired, the neuron cannot fire again until: a) the resting membrane potential has been restored. b) the rising phase of the action potential has reached its peak. c) the reuptake of neurotransmitters has been blocked. d) the direction of the nerve impulse within the axon has been reversed.

57 The chemical signaling of neurons, provided by the action of neurotransmitters, is depicted in the figure below. Arrange the following in the proper order in which they occur at the pre- synaptic side of a neuromuscular junction. 1. Calcium ions enter the pre- synaptic cell via voltage- gated calcium channels. 2. An action potential arrives at the pre- synaptic axon terminal. 3. Neurotransmitter is released into the synapse. A) 1, 2, 3 B) 2, 1, 3 C) 2, 3, 1 D) 3, 2, 1 E) 3, 1, 2

58 The chemical signaling of neurons, provided by the action of neurotransmitters, is depicted in the figure below. Arrange the following in the proper order in which they occur at the pre- synaptic side of a neuromuscular junction. 1. Calcium ions enter the pre- synaptic cell via voltage- gated calcium channels. 2. An action potential arrives at the pre- synaptic axon terminal. 3. Neurotransmitter is released into the synapse. A) 1, 2, 3 B) 2, 1, 3 C) 2, 3, 1 D) 3, 2, 1 E) 3, 1, 2

59 The chemical signaling of neurons, provided by the action of neurotransmitters, is depicted in the figure below. Arrange the following in the proper order in which they occur at the post- synaptic side of a excitatory synapse. 1. The neurotransmitter binds to its matching, specific ligand- gated ion- channel on the membrane of the post- synaptic neuron. 2. An action potential is propagated along the post- synaptic neuron s axon 3. Depolarization of the post- synaptic membrane. 4. Sodium ions move into the post- synaptic cell. A) 1, 2, 3, 4 B) 2, 1, 3, 4 C) 4, 2, 3, 1 D) 1, 4, 3, 2 E) 3, 1, 2, 4

60 The chemical signaling of neurons, provided by the action of neurotransmitters, is depicted in the figure below. Arrange the following in the proper order in which they occur at the post- synaptic side of a excitatory synapse. 1. The neurotransmitter binds to its matching, specific ligand- gated ion- channel on the membrane of the post- synaptic neuron. 2. An action potential is propagated along the post- synaptic neuron s axon 3. Depolarization of the post- synaptic membrane. 4. Sodium ions move into the post- synaptic cell. A) 1, 2, 3, 4 B) 2, 1, 3, 4 C) 4, 2, 3, 1 D) 1, 4, 3, 2 E) 3, 1, 2, 4

61 PUTTING IT ALL TOGETHER!!!! List the following in order of their occurrence: A. An action potential travels along axon of the pre- synaptic neuron. B. An action potential is propagated along the post- synaptic neuron s axon. C. The neurotransmitter crosses the synaptic gap and binds with its matching ligand- gated ion channel on the membrane of the post- synaptic neuron. D. Sodium ions move into the post- synaptic cell. E. Calcium ions enter the pre- synaptic cell via voltage- gated calcium channels. F. The action potential arrives at the pre- synaptic axon endings. G. Neurotransmitter is released into the synapse. H. Depolarization of the post- synaptic membrane.

62 PUTTING IT ALL TOGETHER!!!! List the following in order of their occurrence: A. An action potential travels along axon of the pre- synaptic neuron. B. An action potential is propagated along the post- synaptic neuron s axon. C. The neurotransmitter crosses the synaptic gap and binds with its matching ligand- gated ion channel on the membrane of the post- synaptic neuron. D. Sodium ions move into the post- synaptic cell. E. Calcium ions enter the pre- synaptic cell via voltage- gated calcium channels. F. The action potential arrives at the pre- synaptic axon endings. G. Neurotransmitter is released into the synapse. H. Depolarization of the post- synaptic membrane. A, F, E, G, C, D, H, B

63 PUTTING IT ALL TOGETHER!!!! OR, REARRANGING THEM TO BE IN ORDER. 1. An action potential travels along axon of the pre- synaptic neuron. 2. The action potential arrives at the pre- synaptic axon endings. 3. Calcium ions enter the pre- synaptic cell via voltage- gated calcium channels. 4. Neurotransmitter is released into the synapse. 5. The neurotransmitter crosses the synaptic gap and binds with its matching ligand- gated ion channel on the membrane of the post- synaptic neuron. 6. Sodium ions move into the post- synaptic cell. 7. Depolarization of the post- synaptic membrane. 8. An action potential is propagated along the post- synaptic neuron s axon.

64 The process by which neurotransmitter molecules detach from a postsynaptic neuron are reabsorbed by a pre- synaptic neuron so they can be recycled and used again. A. axon terminals B. synaptic transmission C. reuptake D. diffusion

65 The process by which neurotransmitter molecules detach from a postsynaptic neuron are reabsorbed by a pre- synaptic neuron so they can be recycled and used again. A. axon terminals B. synaptic transmission C. reuptake D. diffusion

66 Which of the following mechanisms can serve to remove neurotransmitter from the synaptic cleft? A) Reuptake by the axon terminus of the pre- synaptic cell B) Breakdown by enzymes C) Diffusion away from the synaptic cleft D) All of the above

67 Which of the following mechanisms can serve to remove neurotransmitter from the synaptic cleft? A) Reuptake by the axon terminus of the pre- synaptic cell B) Breakdown by enzymes C) Diffusion away from the synaptic cleft D)All of the above

Bi 360: Midterm Review

Bi 360: Midterm Review Bi 360: Midterm Review Basic Neurobiology 1) Many axons are surrounded by a fatty insulating sheath called myelin, which is interrupted at regular intervals at the Nodes of Ranvier, where the action potential

More information

A membrane s structure and functions are determined by its constituents: lipids, proteins, and carbohydrates.

A membrane s structure and functions are determined by its constituents: lipids, proteins, and carbohydrates. A membrane s structure and functions are determined by its constituents: lipids, proteins, and carbohydrates. The general design of membranes is known as the fluid mosaic model. Phospholipids form a continuous

More information

Biology Slide 1 of 38

Biology Slide 1 of 38 Biology 1 of 38 2 of 38 35-2 The Nervous System What are the functions of the nervous system? 3 of 38 35-2 The Nervous System 1. Nervous system: a. controls and coordinates functions throughout the body

More information

AP Biology I. Nervous System Notes

AP Biology I. Nervous System Notes AP Biology I. Nervous System Notes 1. General information: passage of information occurs in two ways: Nerves - process and send information fast (eg. stepping on a tack) Hormones - process and send information

More information

Cell Biology - Part 2 Membranes

Cell Biology - Part 2 Membranes Cell Biology - Part 2 Membranes The organization of cells is made possible by membranes. Membranes isolate, partition, and compartmentalize cells. 1 Membranes isolate the inside of the cell from the outside

More information

Neural Communication by Richard H. Hall, 1998

Neural Communication by Richard H. Hall, 1998 Neural Communication by Richard H. Hall, 1998 Forces and Membranes Now that we've considered the structure of the cells of the nervous system it is important to address their principal function, communication.

More information

Allows certain materials and of the cell. The cell membrane is selectively permeable

Allows certain materials and of the cell. The cell membrane is selectively permeable Overview The cell membrane forms a barrier around the cell and separates it from the outside environment What is the main function of the cell membrane? Allows certain materials and of the cell The cell

More information

Cells Need to Exchange Materials with the Extracellular Fluid. Membrane Transport. Plasma Membrane. Cells Must Control Movements of Materials

Cells Need to Exchange Materials with the Extracellular Fluid. Membrane Transport. Plasma Membrane. Cells Must Control Movements of Materials Membrane Transport Chapter 6 Cells Need to Exchange Materials with the Extracellular Fluid Take in nutrients O 2 energy substrates building materials cofactors Dispose of wastes CO 2 Urea Cells Must Control

More information

Osmosis, Diffusion and Cell Transport

Osmosis, Diffusion and Cell Transport Osmosis, Diffusion and Cell Transport Types of Transport There are 3 types of transport in cells: 1. Passive Transport: does not use the cell s energy in bringing materials in & out of the cell 2. Active

More information

Nerves and Nerve Impulse

Nerves and Nerve Impulse Nerves and Nerve Impulse Terms Absolute refractory period: Period following stimulation during which no additional action potential can be evoked. Acetylcholine: Chemical transmitter substance released

More information

Chapter 5 The Plasma Membrane and Transport

Chapter 5 The Plasma Membrane and Transport Chapter 5 The Plasma Membrane and Transport State Standard Standard 1.a. Membrane Function 1, Forms a boundary between living cells and their surroundings. 2. Controls the movement of molecules into and

More information

The Cell Membrane and Transport

The Cell Membrane and Transport The Cell Membrane and Transport Membrane Structure Fluid Mosaic Structure: The Fluid Part Phospholipids: main lipid in the cell membrane; in a bilayer Polar head = attracted to water - hydrophilic Non-polar

More information

NEUROSCIENCE EXAM 1 FALL 2011 KEY

NEUROSCIENCE EXAM 1 FALL 2011 KEY NEUROSCIENCE EXAM 1 FALL 2011 KEY Multiple Choice: Read the entire question and all answers before choosing (circle the letter ) the one best answer. Each question is worth 2 point 1. Which of the following

More information

12. Nervous System: Nervous Tissue

12. Nervous System: Nervous Tissue 12. Nervous System: Nervous Tissue I. Introduction to the Nervous System General functions of the nervous system The nervous system has three basic functions: 1. Gather sensory input from the environment

More information

Cell Membrane Structure and Function. Prof. Dr. Turgut Ulutin

Cell Membrane Structure and Function. Prof. Dr. Turgut Ulutin Cell Membrane Structure and Function Prof. Dr. Turgut Ulutin Why do we need the plasma membrane? Keeping the goods concentrated Keeping harmful materials out Transports substances in and out of the cell

More information

The Cell Membrane MEMBRANE STRUCTURE AND FUNCTION. Mader: Chapter Membranes are a fluid mosaic of phospholipids and proteins

The Cell Membrane MEMBRANE STRUCTURE AND FUNCTION. Mader: Chapter Membranes are a fluid mosaic of phospholipids and proteins The Cell Membrane Mader: Chapter 4 MEMBRANE STRUCTURE AND FUNCTION 5.1 Membranes are a fluid mosaic of! Membranes are composed of phospholipids and proteins Membranes are commonly described as a fluid

More information

Transport Across Cell Membranes

Transport Across Cell Membranes Transport Across Cell Membranes CELL MEMBRANE STRUCTURE A phospholipid bilayer makes up the main part of the cell membrane Each phospholipid molecule contains a charged polar head (H 2 O-loving) and non-polar,

More information

CHAPTER 5 SIGNALLING IN NEURONS

CHAPTER 5 SIGNALLING IN NEURONS 5.1. SYNAPTIC TRANSMISSION CHAPTER 5 SIGNALLING IN NEURONS One of the main functions of neurons is to communicate with other neurons. An individual neuron may receive information from many different sources.

More information

Neuron Function. How does a signal travel across and between neurons?

Neuron Function. How does a signal travel across and between neurons? Why? Neuron Function How does a signal travel across and between neurons? Just as the coaxial cables that run down your street or through your house carry television and Internet signals, the job of a

More information

The Cell Membrane: Structure and Func4on

The Cell Membrane: Structure and Func4on The Cell Membrane: Structure and Func4on Overview of the Cell Membrane All cells have a cell membrane Separates living cell from nonliving surroundings Mainly made of phospholipids proteins & other macromolecules

More information

Cell Transport and Plasma Membrane Structure

Cell Transport and Plasma Membrane Structure Cell Transport and Plasma Membrane Structure POGIL Guided Inquiry Learning Targets Explain the importance of the plasma membrane. Compare and contrast different types of passive transport. Explain how

More information

What will you learn?

What will you learn? What will you learn? Cell Membrane and Transport PLO B9 B10 It is expected that students will analyse the structure and function of the cell membrane explain why cells divide when they reach a particular

More information

Cell Membrane & Tonicity Worksheet

Cell Membrane & Tonicity Worksheet NAME ANSWER KEY DATE PERIOD Cell Membrane & Tonicity Worksheet Composition of the Cell Membrane & Functions The cell membrane is also called the PLASMA membrane and is made of a phospholipid BI-LAYER.

More information

1. The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called.

1. The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called. Cell Membranes 1. The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called. 2. Due to the repellent nature of the polar water molecules, the tails of the phospholipids

More information

Medfamily team Medfamily team 1) The resting membrane potential: a. Is much closer to the equilibrium for Na+ than to the equilibrium potential for

Medfamily team Medfamily team 1) The resting membrane potential: a. Is much closer to the equilibrium for Na+ than to the equilibrium potential for 1) The resting membrane potential: a. Is much closer to the equilibrium for Na+ than to the equilibrium potential for K+. b. Is much closer to the equilibrium for K+ than to the equilibrium potential for

More information

The Neuron and the Synapse. The Neuron. Parts of the Neuron. Functions of the neuron:

The Neuron and the Synapse. The Neuron. Parts of the Neuron. Functions of the neuron: The Neuron and the Synapse The Neuron Functions of the neuron: Transmit information from one point in the body to another. Process the information in various ways (that is, compute). The neuron has a specialized

More information

Parts of the Nerve Cell and Their Functions

Parts of the Nerve Cell and Their Functions Parts of the Nerve Cell and Their Functions Silvia Helena Cardoso, PhD [ 1. Cell body] [2. Neuronal membrane] [3. Dendrites] [4. Axon] [5. Nerve ending] 1. Cell body The cell body (soma) is the factory

More information

Resting membrane potential ~ -70mV - Membrane is polarized

Resting membrane potential ~ -70mV - Membrane is polarized Resting membrane potential ~ -70mV - Membrane is polarized (ie) Electrical charge on the outside of the membrane is positive while the electrical charge on the inside of the membrane is negative Changes

More information

1.1.2. thebiotutor. AS Biology OCR. Unit F211: Cells, Exchange & Transport. Module 1.2 Cell Membranes. Notes & Questions.

1.1.2. thebiotutor. AS Biology OCR. Unit F211: Cells, Exchange & Transport. Module 1.2 Cell Membranes. Notes & Questions. thebiotutor AS Biology OCR Unit F211: Cells, Exchange & Transport Module 1.2 Cell Membranes Notes & Questions Andy Todd 1 Outline the roles of membranes within cells and at the surface of cells. The main

More information

CHAPTER 5.1 5.2: Plasma Membrane Structure

CHAPTER 5.1 5.2: Plasma Membrane Structure CHAPTER 5.1 5.2: Plasma Membrane Structure 1. Describe the structure of a phospholipid molecule. Be sure to describe their behavior in relationship to water. 2. What happens when a collection of phospholipids

More information

Modes of Membrane Transport

Modes of Membrane Transport Modes of Membrane Transport Transmembrane Transport movement of small substances through a cellular membrane (plasma, ER, mitochondrial..) ions, fatty acids, H 2 O, monosaccharides, steroids, amino acids

More information

Neurophysiology. 2.1 Equilibrium Potential

Neurophysiology. 2.1 Equilibrium Potential 2 Neurophysiology 2.1 Equilibrium Potential An understanding of the concepts of electrical and chemical forces that act on ions, electrochemical equilibrium, and equilibrium potential is a powerful tool

More information

Cell Processes. Chapter Review

Cell Processes. Chapter Review Name Date Class Chapter Review Cell Processes Part A. Vocabulary Review Directions: Select the term from the following list that matches each description. active transport energy enzyme inorganic compound

More information

4. Biology of the Cell

4. Biology of the Cell 4. Biology of the Cell Our primary focus in this chapter will be the plasma membrane and movement of materials across the plasma membrane. You should already be familiar with the basic structures and roles

More information

Name: Teacher: Olsen Hour:

Name: Teacher: Olsen Hour: Name: Teacher: Olsen Hour: The Nervous System: Part 1 Textbook p216-225 41 In all exercises, quizzes and tests in this class, always answer in your own words. That is the only way that you can show that

More information

FIGURE 2.18. A. The phosphate end of the molecule is polar (charged) and hydrophilic (attracted to water).

FIGURE 2.18. A. The phosphate end of the molecule is polar (charged) and hydrophilic (attracted to water). PLASMA MEMBRANE 1. The plasma membrane is the outermost part of a cell. 2. The main component of the plasma membrane is phospholipids. FIGURE 2.18 A. The phosphate end of the molecule is polar (charged)

More information

Ion Channels. Graphics are used with permission of: Pearson Education Inc., publishing as Benjamin Cummings (http://www.aw-bc.com)

Ion Channels. Graphics are used with permission of: Pearson Education Inc., publishing as Benjamin Cummings (http://www.aw-bc.com) Ion Channels Graphics are used with permission of: Pearson Education Inc., publishing as Benjamin Cummings (http://www.aw-bc.com) ** There are a number of ion channels introducted in this topic which you

More information

The structure and function of the plasma membrane

The structure and function of the plasma membrane The structure and function of the plasma membrane Our current view of membrane structure is based on the fluid mosaic model. This model proposes that membranes are not rigid, with molecules locked into

More information

REVIEW SHEET EXERCISE 3 Neurophysiology of Nerve Impulses Name Lab Time/Date. The Resting Membrane Potential

REVIEW SHEET EXERCISE 3 Neurophysiology of Nerve Impulses Name Lab Time/Date. The Resting Membrane Potential REVIEW SHEET EXERCISE 3 Neurophysiology of Nerve Impulses Name Lab Time/Date ACTIVITY 1 The Resting Membrane Potential 1. Explain why increasing extracellular K + reduces the net diffusion of K + out of

More information

Chapter 8. Movement across the Cell Membrane. AP Biology

Chapter 8. Movement across the Cell Membrane. AP Biology Chapter 8. Movement across the Cell Membrane More than just a barrier Expanding our view of cell membrane beyond just a phospholipid bilayer barrier phospholipids plus Fluid Mosaic Model In 1972, S.J.

More information

3.3 Cell Membrane (p. 81)

3.3 Cell Membrane (p. 81) Name Bio PreAP/GT 3.3 Cell Membrane (p. 81) Cell Membranes are composed of two phospholipid layers. The cell membrane, or the membrane, forms a boundary between a cell and the outside environment and controls

More information

Six major functions of membrane proteins: Transport Enzymatic activity

Six major functions of membrane proteins: Transport Enzymatic activity CH 7 Membranes Cellular Membranes Phospholipids are the most abundant lipid in the plasma membrane. Phospholipids are amphipathic molecules, containing hydrophobic and hydrophilic regions. The fluid mosaic

More information

Anatomy and Physiology Placement Exam 2 Practice with Answers at End!

Anatomy and Physiology Placement Exam 2 Practice with Answers at End! Anatomy and Physiology Placement Exam 2 Practice with Answers at End! General Chemical Principles 1. bonds are characterized by the sharing of electrons between the participating atoms. a. hydrogen b.

More information

Chapter 7: Membrane Structure and Function

Chapter 7: Membrane Structure and Function Name Period Concept 7.1 Cellular membranes are fluid mosaics of lipids and proteins 1. The large molecules of all living things fall into just four main classes. Name them. 2. Explain what is meant when

More information

Membrane Structure and Function

Membrane Structure and Function Membrane Structure and Function Part A Multiple Choice 1. The fluid mosaic model describes membranes as having A. a set of protein channels separated by phospholipids. B. a bilayer of phospholipids in

More information

Passive electrotonic conduction decays with distance 1. Cytoplasm resistance 2. Plasma membrane resistance 3. Charges leaks out

Passive electrotonic conduction decays with distance 1. Cytoplasm resistance 2. Plasma membrane resistance 3. Charges leaks out Graded Potentials Passive electrotonic conduction decays with distance 1. Cytoplasm resistance 2. Plasma membrane resistance 3. Charges leaks out Length constant ( ) is defined as the distance over which

More information

Membrane Transport. Extracellular Concentration of X

Membrane Transport. Extracellular Concentration of X Use the following graph to answer questions 1 and 2. Rate of diffusion of X into the cell 1. Which of the following processes is represented by the above graph? c. Active transport 2. Molecule X is most

More information

Chapter 5: The Working Cell

Chapter 5: The Working Cell Chapter 5: The Working Cell SOME BASIC ENERGY CONCEPTS Energy makes the world go around, but what is energy? Energy is defined as the capacity to perform work. Kinetic energy is the energy of motion. Potential

More information

Activity 5: The Action Potential: Measuring Its Absolute and Relative Refractory Periods. 250 20 Yes. 125 20 Yes. 60 20 No. 60 25 No.

Activity 5: The Action Potential: Measuring Its Absolute and Relative Refractory Periods. 250 20 Yes. 125 20 Yes. 60 20 No. 60 25 No. 3: Neurophysiology of Nerve Impulses (Part 2) Activity 5: The Action Potential: Measuring Its Absolute and Relative Refractory Periods Interval between stimuli Stimulus voltage (mv) Second action potential?

More information

CELL MEMBRANES, TRANSPORT, and COMMUNICATION. Teacher Packet

CELL MEMBRANES, TRANSPORT, and COMMUNICATION. Teacher Packet AP * BIOLOGY CELL MEMBRANES, TRANSPORT, and COMMUNICATION Teacher Packet AP* is a trademark of the College Entrance Examination Board. The College Entrance Examination Board was not involved in the production

More information

Nerve Cell Flashcards

Nerve Cell Flashcards 1. What does the word innervates mean? Refers to a nerve supplying a muscle or organ. For example, The phrenic nerve innervates the diaphragm muscle. 2. 3 parts of the Nervous System 1. Central Nervous

More information

Homeostasis & Cell Transport

Homeostasis & Cell Transport In order to maintain life, organisms must regulate the balance of materials inside and outside of the cell. This is accomplished by the transport of materials through the plasma membrane. Homeostasis &

More information

Go to the following web site and follow the instructions below:

Go to the following web site and follow the instructions below: The nervous system consists of three parts: the Brain, the Central Nervous System, and the Peripheral Nervous System. The Brain is the command center, the Central Nervous System is the brain and the spinal

More information

The light comes from a set of chemical reactions, the luciferin-luciferase system Fireflies make light energy from chemical energy

The light comes from a set of chemical reactions, the luciferin-luciferase system Fireflies make light energy from chemical energy Cool Fires Attract Mates and Meals Fireflies use light instead of chemical signals to send a message to potential mates Females can also use light to attract males of other firefly species, as meals not

More information

Cell Membrane Coloring Worksheet

Cell Membrane Coloring Worksheet Cell Membrane Coloring Worksheet Composition of the Cell Membrane & Functions The cell membrane is also called the plasma membrane and is made of a phospholipid bilayer. The phospholipids have a hydrophilic

More information

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Chapter 2 The Neural Impulse Name Period Date MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The cell body is enclosed by the. A) cell membrane

More information

The Action Potential Graphics are used with permission of: adam.com (http://www.adam.com/) Benjamin Cummings Publishing Co (http://www.awl.

The Action Potential Graphics are used with permission of: adam.com (http://www.adam.com/) Benjamin Cummings Publishing Co (http://www.awl. The Action Potential Graphics are used with permission of: adam.com (http://www.adam.com/) Benjamin Cummings Publishing Co (http://www.awl.com/bc) ** If this is not printed in color, it is suggested you

More information

Lab #6: Neurophysiology Simulation

Lab #6: Neurophysiology Simulation Lab #6: Neurophysiology Simulation Background Neurons (Fig 6.1) are cells in the nervous system that are used conduct signals at high speed from one part of the body to another. This enables rapid, precise

More information

Test Booklet. Subject: SC, Grade: 9- Quiz: Cell Processes. Student name:

Test Booklet. Subject: SC, Grade: 9- Quiz: Cell Processes. Student name: Test Booklet Subject: SC, Grade: 9- Quiz: Cell Processes Student name: Author: Jennifer Holm School: Lincoln High School Printed: Tuesday February 09, 2016 1 Which describes the cell theory? A Cells are

More information

ANIMATED NEUROSCIENCE

ANIMATED NEUROSCIENCE ANIMATED NEUROSCIENCE and the Action of Nicotine, Cocaine, and Marijuana in the Brain Te a c h e r s G u i d e Films for the Humanities & Sciences Background Information This program, made entirely of

More information

Keystone Review Practice Test Module A Cells and Cell Processes. 1. Which characteristic is shared by all prokaryotes and eukaryotes?

Keystone Review Practice Test Module A Cells and Cell Processes. 1. Which characteristic is shared by all prokaryotes and eukaryotes? Keystone Review Practice Test Module A Cells and Cell Processes 1. Which characteristic is shared by all prokaryotes and eukaryotes? a. Ability to store hereditary information b. Use of organelles to control

More information

Nerve Cell Communication

Nerve Cell Communication Nerve Cell Communication Part 1: What are the parts of a nerve cell? 1. Read the information in the Biology Brief: Neurons. As you read, circle the names of the structures (parts) of the neuron. 2. Obtain

More information

Transporting molecules across cell membranes. Nutrients, wastes, hormones, ions

Transporting molecules across cell membranes. Nutrients, wastes, hormones, ions Transporting molecules across cell membranes Nutrients, wastes, hormones, ions Recall phospholipid bilayer It s a barrier! Only a small subset of molecules may pass through without help Cell membrane Sense

More information

Date: Student Name: Teacher Name: Jared George. Score: 1) A cell with 1% solute concentration is placed in a beaker with a 5% solute concentration.

Date: Student Name: Teacher Name: Jared George. Score: 1) A cell with 1% solute concentration is placed in a beaker with a 5% solute concentration. Biology Keystone (PA Core) Quiz Homeostasis and Transport - (BIO.A.4.1.1 ) Plasma Membrane, (BIO.A.4.1.2 ) Transport Mechanisms, (BIO.A.4.1.3 ) Transport Facilitation Student Name: Teacher Name: Jared

More information

CELL MEMBRANE & CELL TRANSPORT (PASSIVE and ACTIVE) Webquest

CELL MEMBRANE & CELL TRANSPORT (PASSIVE and ACTIVE) Webquest Name: Period: CELL MEMBRANE & CELL TRANSPORT (PASSIVE and ACTIVE) Webquest PART I: CELL MEMBRANES WEBSITE #1: http://www.wisc-online.com/objects/index_tj.asp?objid=ap1101 1. What is the BASIC UNIT of LIFE?

More information

Keystone Study Guide Module A: Cells and Cell Processes

Keystone Study Guide Module A: Cells and Cell Processes Keystone Study Guide Module A: Cells and Cell Processes Topic 1: Biological Principles Cells and the Organization of Life Characteristics of Life all living things share the following characteristics:

More information

Transmembrane proteins span the bilayer. α-helix transmembrane domain. Multiple transmembrane helices in one polypeptide

Transmembrane proteins span the bilayer. α-helix transmembrane domain. Multiple transmembrane helices in one polypeptide Transmembrane proteins span the bilayer α-helix transmembrane domain Hydrophobic R groups of a.a. interact with fatty acid chains Multiple transmembrane helices in one polypeptide Polar a.a. Hydrophilic

More information

BSC 2010 - Exam I Lectures and Text Pages. The Plasma Membrane Structure and Function. Phospholipids. I. Intro to Biology (2-29) II.

BSC 2010 - Exam I Lectures and Text Pages. The Plasma Membrane Structure and Function. Phospholipids. I. Intro to Biology (2-29) II. BSC 2010 - Exam I Lectures and Text Pages I. Intro to Biology (2-29) II. Chemistry of Life Chemistry review (30-46) Water (47-57) Carbon (58-67) Macromolecules (68-91) III. Cells and Membranes Cell structure

More information

I. What is the structure of the plasma membrane and what functions does it make possible?

I. What is the structure of the plasma membrane and what functions does it make possible? Subquestions: I. What is the structure of the plasma membrane and what functions does it make possible? A. What is the structure of the membrane? B. What are the following terms, how does the membrane

More information

BIOLOGY 12 - Cell Membrane and Cell Wall Function: Chapter Notes

BIOLOGY 12 - Cell Membrane and Cell Wall Function: Chapter Notes BIOLOGY 12 - Cell Membrane and Cell Wall Function: Chapter Notes The cell membrane is the gateway into the cell, and must allow needed things such as nutrients into the cell without letting them escape.

More information

AP Biology. The Cell Membrane

AP Biology. The Cell Membrane The Cell Membrane Phospholipids Phosphate head hydrophilic Fatty acid tails hydrophobic Arranged as a bilayer Phosphate attracted to water Fatty acid repelled by water Aaaah, one of those structure function

More information

Tibor G. Szántó Medical and Health Science Center, University of Debrecen Department of Biophysics and Cell Biology

Tibor G. Szántó Medical and Health Science Center, University of Debrecen Department of Biophysics and Cell Biology Resting potential, action potential and electrical excitibility. Measurement of membrane potential. Tibor G. Szántó Medical and Health Science Center, University of Debrecen Department of Biophysics and

More information

Cell Membrane. The cell membrane is flexible and allows a unicellular organism to move

Cell Membrane. The cell membrane is flexible and allows a unicellular organism to move Cell Membrane Outer membrane of the cell to protect its contents Regulates the molecules that pass in and out of the cell (selectively permeable) Give the cell its shape Cell Membrane Outer membrane of

More information

Cell Membrane Structure (and How to Get Through One)

Cell Membrane Structure (and How to Get Through One) Cell Membrane Structure (and How to Get Through One) A cell s membrane is a wall of sorts that defines the boundaries of a cell. The membrane provides protection and structure for the cell and acts as

More information

Membrane Structure and Function

Membrane Structure and Function Membrane Structure and Function -plasma membrane acts as a barrier between cells and the surrounding. -plasma membrane is selective permeable -consist of lipids, proteins and carbohydrates -major lipids

More information

Total body water ~(60% of body mass): Intracellular fluid ~2/3 or ~65% Extracellular fluid ~1/3 or ~35% fluid. Interstitial.

Total body water ~(60% of body mass): Intracellular fluid ~2/3 or ~65% Extracellular fluid ~1/3 or ~35% fluid. Interstitial. http://www.bristol.ac.uk/phys-pharm/teaching/staffteaching/sergeykasparov.htmlpharm/teaching/staffteaching/sergeykasparov.html Physiology of the Cell Membrane Membrane proteins and their roles (channels,

More information

FUNCTIONS OF THE NERVOUS SYSTEM 1. Sensory input. Sensory receptors detects external and internal stimuli.

FUNCTIONS OF THE NERVOUS SYSTEM 1. Sensory input. Sensory receptors detects external and internal stimuli. FUNCTIONS OF THE NERVOUS SYSTEM 1. Sensory input. Sensory receptors detects external and internal stimuli. 2. Integration. The brain and spinal cord process sensory input and produce responses. 3. Homeostasis.

More information

Unit 2: Cells, Membranes and Signaling CELL MEMBRANE. Chapter 5 Hillis Textbook

Unit 2: Cells, Membranes and Signaling CELL MEMBRANE. Chapter 5 Hillis Textbook Unit 2: Cells, Membranes and Signaling CELL MEMBRANE Chapter 5 Hillis Textbook HOW DOES THE LAB RELATE TO THE NEXT CHAPTER? SURFACE AREA: the entire outer covering of a cell that enables materials pass.

More information

PSI Biology Membranes & Enzymes

PSI Biology Membranes & Enzymes Membranes Membranes, Diffusion Classwork 1. How does a phospholipid membrane create an isolated internal environment? 2. Draw and label a phospholipid. 3. In what way do the screen on a window and a cell

More information

Name Date Class. This section describes cell structure and function in plant cells, animal cells, and bacteria.

Name Date Class. This section describes cell structure and function in plant cells, animal cells, and bacteria. Looking Inside Cells This section describes cell structure and function in plant cells, animal cells, and bacteria. Use Target Reading Skills Before you read, preview Figure 12. Then write two questions

More information

Biol 101 Exam 2: Cells & Cell Membranes Fall 2008

Biol 101 Exam 2: Cells & Cell Membranes Fall 2008 MULTIPLE CHOICE. There are 60 questions on this exam. All answers go on the Scantron. Choose the one alternative that best completes the statement or answers the question. 1. The cell theory is one of

More information

Andrew Rosen - Chapter 3: The Brain and Nervous System Intro:

Andrew Rosen - Chapter 3: The Brain and Nervous System Intro: Intro: Brain is made up of numerous, complex parts Frontal lobes by forehead are the brain s executive center Parietal lobes wave sensory information together (maps feeling on body) Temporal lobes interpret

More information

Tutorial 2, Plasma Membrane

Tutorial 2, Plasma Membrane IPAM Cells and Materials: At the Interface between Mathematics, Biology and Engineering Tutorial 2, Plasma Membrane Dr. Toshikazu Hamasaki Dept. Bioengineering, UCLA Plasma Membrane Lipid Bi-layer Creates

More information

MEMBRANE STRUCTURE AND FUNCTION

MEMBRANE STRUCTURE AND FUNCTION Chapter 5 The Working Cell: Membranes, Energy, and s Chapter 5: Big Ideas Cellular respiration Membrane Structure and Function Energy and the Cell How s Function MEMBRANE STRUCTURE AND FUNCTION Membranes

More information

Nerves and Conduction of Nerve Impulses

Nerves and Conduction of Nerve Impulses A. Introduction 1. Innovation in Cnidaria - Nerve net a. We need to talk more about nerves b. Cnidaria have simple nerve net - 2 way conduction c. Basis for more complex system in Vertebrates B. Vertebrate

More information

Chapter 3. Cellular Structure and Function Worksheets. 39 www.ck12.org

Chapter 3. Cellular Structure and Function Worksheets. 39 www.ck12.org Chapter 3 Cellular Structure and Function Worksheets (Opening image copyright by Sebastian Kaulitzki, 2010. Used under license from Shutterstock.com.) Lesson 3.1: Introduction to Cells Lesson 3.2: Cell

More information

2006 7.012 Problem Set 6 KEY

2006 7.012 Problem Set 6 KEY 2006 7.012 Problem Set 6 KEY ** Due before 5 PM on WEDNESDAY, November 22, 2006. ** Turn answers in to the box outside of 68-120. PLEASE WRITE YOUR ANSWERS ON THIS PRINTOUT. 1. You create an artificial

More information

Section 7-3 Cell Boundaries

Section 7-3 Cell Boundaries Note: For the past several years, I ve been puzzling how to integrate new discoveries on the nature of water movement through cell membranes into Chapter 7. The Section below is a draft of my first efforts

More information

Nerve Cell Communication

Nerve Cell Communication Nerve Cell Communication Core Concept: Nerve cells communicate using electrical and chemical signals. Class time required: Approximately 2 forty minute class periods Teacher Provides: For each student

More information

Ions cannot cross membranes. Ions move through pores

Ions cannot cross membranes. Ions move through pores Ions cannot cross membranes Membranes are lipid bilayers Nonpolar tails Polar head Fig 3-1 Because of the charged nature of ions, they cannot cross a lipid bilayer. The ion and its cloud of polarized water

More information

The human respiratory system includes the nose, the larynx, and the lungs. This body system helps maintain homeostasis by

The human respiratory system includes the nose, the larynx, and the lungs. This body system helps maintain homeostasis by Study Island 1. During heatstroke, the body can't dispose of excess heat. As a result, the homeostatic balance is disturbed, and internal body temperatures can reach as much as 110. Heatstroke is dangerous

More information

The cell. Lecture 5. The Cell membrane and Membrane Proteins. Cellular membranes A cell is the simplest collection of matter that can live

The cell. Lecture 5. The Cell membrane and Membrane Proteins. Cellular membranes A cell is the simplest collection of matter that can live Lecture 5 The cell The Cell membrane and Membrane Proteins Ameoba- single celled organism A single human cell The Cell is the simplest collec4on of ma9er that can live Cells 4ssue organ Cellular membranes

More information

7.013 Problem Set

7.013 Problem Set 7.013 Problem Set 6-2013 Question 1 a) Our immune system is comprised of different cell types. Complete the table below by selecting all correct cell types from the choices provided. Cells types that Participate

More information

PRESTWICK ACADEMY NATIONAL 5 BIOLOGY CELL BIOLOGY SUMMARY

PRESTWICK ACADEMY NATIONAL 5 BIOLOGY CELL BIOLOGY SUMMARY Name PRESTWICK ACADEMY NATIONAL 5 BIOLOGY CELL BIOLOGY SUMMARY Cell Structure Identify animal, plant, fungal and bacterial cell ultrastructure and know the structures functions. Plant cell Animal cell

More information

Cell and Membrane Practice. A. chromosome B. gene C. mitochondrion D. vacuole

Cell and Membrane Practice. A. chromosome B. gene C. mitochondrion D. vacuole Name: ate: 1. Which structure is outside the nucleus of a cell and contains N?. chromosome. gene. mitochondrion. vacuole 2. potato core was placed in a beaker of water as shown in the figure below. Which

More information

Questions on The Nervous System and Gas Exchange

Questions on The Nervous System and Gas Exchange Name: Questions on The Nervous System and Gas Exchange Directions: The following questions are taken from previous IB Final Papers on Topics 6.4 (Gas Exchange) and 6.5 (Nerves, hormones and homeostasis).

More information

Cells and Their Housekeeping Functions Cell Membrane & Membrane Potential

Cells and Their Housekeeping Functions Cell Membrane & Membrane Potential Cells and Their Housekeeping Functions Cell Membrane & Membrane Potential Shu-Ping Lin, Ph.D. Institute of Biomedical Engineering E-mail: splin@dragon.nchu.edu.tw Website: http://web.nchu.edu.tw/pweb/users/splin/

More information

The Action Potential

The Action Potential OpenStax-CNX module: m46526 1 The Action Potential OpenStax College This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 4.0 By the end of this section, you

More information

Movement in and out of cells

Movement in and out of cells Movement in and out of cells Cells need to take in oxygen and nutrients for respiration. They also need to remove waste products such as CO 2. The cell membrane controls movement of materials. Generally,

More information

Cell membranes and transport. Learning Objective:

Cell membranes and transport. Learning Objective: Cell membranes and transport Content Fluid mosaic model of membrane structure Movement of substances into and out of cells Learning Objective: a. Describe and explain the fluid mosaic model of membrane

More information