Department of Histology and Embryology, P. J. Šafárik University, Medical Faculty, Košice
|
|
- Magdalen Edwards
- 7 years ago
- Views:
Transcription
1 Department of Histology and Embryology, P. J. Šafárik University, Medical Faculty, Košice MUSCLE TISSUE: Sylabus for foreign students Author: doc. MVDr. Iveta Domoráková, PhD. Revised by: prof. MUDr. Eva Mechírová, CSc. MUSCLE TISSUE Function: muscle tissue is specialized for contraction Types of muscle tissue: 1. Striated skeletal muscle 2. Striated cardiac muscle 3. Smooth muscle STRUCTURE OF MUSCLE IN THE LIGHT MICROSCOPE 1. SKELETAL MUSCLE Function: contraction - voluntary and rapid - body movement, muscle tissue in the tongue (speech, mixing of food), breathing, voice BASIC MORPHOLOGIC UNIT in LM: multinucleated skeletal muscle fiber with cross striation. Nuclei are situated below the sarcolemma. Fig. 1 longitudinal and transverse section of skeletal muscle fiber 2. CARDIAC MUSCLE Function: contraction - involuntary; rapid and rhythmic - in the heart (myocardium) BASIC MORPHOLOGIC UNIT in LM: cardiac muscle cell (cardiomyocyte) with cross striation. Nuclei (1-2) are situated in the centre of the cell. Cardiomyocytes are connected by intercalated discs.
2 Fig. 2. longitudinal and transverse section of cardiomyocytes 3. SMOOTH MUSCLE Function: contraction is involuntary; weak and slow - in the wall of hollow organs (stomach, small intestine) BASIC MORPHOLOGIC UNIT in LM: spindle shaped smooth muscle cell. Cytoplasm has no cross striation. Oval or rod-like nuclei in the centre. Fig. 3. longitudinal and transverse section of smooth muscle cells Cytoplasm of muscle fibers and muscle cells is eosinophilic. ORIGIN Most of muscle tissue develops from mesoderm that gives rise to mesenchymal cells. Skeletal muscle develops from paraaxial mesoderm, organized into myotomes in somites. Muscles of the head develop from mesenchyme of branchial arches. Cardiac muscle develops from cardiogenic mesoderm. Smooth muscle develops from splanchnic mesoderm - except of iris where smooth muscle arises from neuroectoderm. Fig. 4 Development of multinucleated muscle fiber from myoblasts.
3 ORGANISATION OF SKELETAL MUSCLE Each muscle fiber is surrounded by endomysium - network of reticular fibers, also contains blood and lymphatic capillaries and nerves. Groups of muscle fibers (anywhere between 10 to 100 or more) form fascicles (bundles). Muscle fascicle is surrounded by perimysium - sheath of connective tissue. Entire muscle is surrounded by epimysium - composed of dense irregular connective tissue. It is continuous with fascia and other connective tissue wrappings of muscle including the endomysium and perimysium. It is also continuous with tendons. Fig. 5. Organisation of skeletal muscle SEQUENCE OF ORGANISATION from muscle to molecular structure (Fig.6.) Muscles are composed of muscle fascicles. They are composed of skeletal muscle fibers (visible in LM). Muscle fiber contains myofibrils (visible in EM). Myofibrils create the biggest part of the sarcoplasm. They are oriented longitudinally with long axis of muscle fiber. Myofilbrils are composed of thin actin filaments (myofilaments) and thick myosin filaments (myofilaments). Actin filament on molecular level is composed of: F-actin, troponin complex (Tn subunits: TnC, TnI, TnT) and tropomyosin. Actin in the sarcomere is bound to the Z-line by an α-actinin.
4 Myosin filament is composed of hundreds of myosin molecules (golf stick shape). Fig.6. Organisation of skeletal muscle from muscle to molecular structure
5 Fig. 7. Sarcomere is a functional unit of striated muscles. Sarcomeres are repeated functional unites visible on the myofibrils in EM. Sarcomere is present between two Z-lines. Z-line serves for attachment of actin filaments. I band is formed only by actin filaments. A band is composed of myosin filaments and partly of actin filaments. H band is present in the centre of A band and is composed of myosin filaments. Width of H band changes during contraction of sarcomere. H band is shorter after contraction and longer after relaxation in dependence how much actin filaments penetrate between myosin filaments. STRUCTURE OF SKELETAL MUSCLE FIBER in ELECTRON MICROSCOPE Muscle fiber (Fig. 8) is covered by sarcolemma. Sarcoplasm is filled predominantly with myofibrils surrounded by sarcoplasmic reticulum (ser). Between myofibrils are mitochondria sarcosomes - energy for contraction. Oval nuclei are situated beneath the sarcolemma. Sarcoplasm contains glycogen granules and pigment myoglobin.
6 Fig.8 Structure of muscle fiber in EM TRIAD 3) 2 terminal cisternae of sarcoplasmic reticulum +1 T-tubule (invagination of sarcolemma; encircle each myofibril at the border of A-band and I band). Function of T-tubules: Fast transmission of nerve impulses by depolarization of membranes (sarcolemma, membranes of sarcoplasmic reticulum Function of sarcoplasmic reticulum: storrage and release of calcium ions necessary for contraction. Calcium ions are bound to the troponin complex of TnC subunit. MYOFIBRILS structural and functional units of muscle fiber - sarcoplasm contains 80% of myofibrils - oriented longitudinally - surrounded by SER, mitochondria (2 %) - composed of myofilaments (actin, myosin)
7 In LM and EM are visible alternating isotropic: I-bands (light) and anisotropic: A- bands (dark) SARCOMERES basic functional units of striated muscle (skeletal, cardiac). Sarcomere is limited by two Z- lines. Z-line is in the centre of isotropic band. Contains α- actinin, protein that binds actin filaments to Z-line. ACTIN and MYOSIN filaments form myofibril. ACTIN FILAMENT 1. F-actin- double helix filament composed of G-actin monomeres 2. Tropomyosin double helix peptide chain; runs in the groove of F-actin chains 3. Troponin complex (3 globular proteins - subunits): - Troponin C (TnC) binds calcium ions contraction - Troponin T (TnT) attachment of troponin to tropomyosin - Troponin I (TnI) inhibits actin-myosin interaction
8 MYOSIN FILAMENT - composed of hundreds of myosin molecules - golf stick shape - rod-like straight part (heavy chain; double helix) - myosin head (flexible; binds to actin filament) Myosin head has: - actin binding site, - ATP binding site, - ATP-ase activity Mechamisms of contraction: Adamkov Functional Histology, lecture + included figures.
9 During contraction occures shortening of: 1. sarcomere 2. I-band 3. H-band (in maximal contraction could disapear)!!! No changes in lenght of : A-band actin and myosin filaments INNERVATION OF SKELETAL MUSCLE - efferent motor nerve endings Motor end-plate or myoneural junction Myelinated motor nerves form terminal arborisation on the surface of skeletal muscle fibers. At their terminal parts they loose myeline sheath and form dilated axonal bouttons covered only by a thin layer of Schwann cell cytoplasm. Bouttons contain axoplasm rich in mitochondria and synaptic vesicles with acetylcholine (ACh). Here the axolemma forms presynaptic membrane. Between the axon and muscle fiber is a synaptic cleft. Sarcolemma at the site of junction forms many invaginations that increase the postsynaptic surface. Sarcoplasm directly below the folds does not contain myofibrils. Postsynaptic membrane - sarcolemma contains acetylcholine receptors. When action potencial reach the motor end plate, acetylcholine is released from the axon terminal to the synaptic cleft and is bound to acetylcholine receptors of the sarcolemma. Sarcolemma becomes more permeable to Na + and this resultes in membrane depolarization. At each triad, the depolarization signal is passed to the sarcoplasmic reticulum and results in Ca 2+ release (calcium ions are bound to troponinc). When the depolarization stops, the Ca 2+ is transported back to the sarcoplasmic reticulum and muscle relaxes. In the synaptic cleft is an active acetylcholinesterase that brake down excess of Ach.
10 CARDIAC MUSCLE CELLS 3 types 1. Contractile cells 2. Impuls generating and conducting cells (initiate heart beat) 3. Myoendocrine cells (production of hormone for regulation of : Na +, K + balance and water in the body)
11 Intercalated discs (ID) Intercalated discs (ID) are connections between cardiac muscle cells. On the transverse site are: fasciae adherentes (α actinin) serves for actin filament attachment desmosomes that serve for strong connection between cardiac muscle cells On the lateral site are: gap junctions (nexus) serve for the transport of ions, spreading of impulses and metabolism Cardiac muscle cells in LM: ID - intercalated discs, nuclei (1-2) in the centre of cell
12 Transverse and longitudinal section of smooth muscle EM: differences between smooth muscle cell and skeletal muscle fiber 1. actin and myosin filaments oriented criss-cross (in striated muscles longitudinally with long axis of the cell) 2. No myofibrils!!! 3. Thin actin filaments have no troponin complex 4. Intermediate filaments: desmin and vimentin 5. Dense bodies ( function like Z-line, contain α-actinin) a) cytoplasmic b) below sarcolemma 6. Sarcolemma invaginations involved in transport of Ca 2+ from extracellular space into smooth muscle cell cytoplasm pinocytotic vesicles 7. Mitochondria, rer and Golgi apparatus 8. Basal lamina + reticular fibers on the cell surface (produced by cell) 9. Nexus smooth muscle cells spread ions through gap junctions Function: 1. Contraction (smooth muscle in the hollow organs forms compact layers that regulate diameter of the lumens)
13 2. Secretion (rer, GA): synthesis of colagen type III, elastic fibers, proteoglycans CONTRACTION OF SMOOTH MUSCLE CELL CONTRACTION criss cross orientation of myofilaments give special shape to the cell after contraction after contraction rod-like nucleus is changed to cork-screw Contraction of smooth muscle cells is involuntary 1. inervation by autonomic nerve system 2. hormonal stimulation (e.g. smooth muscle in the uterus during pregnancy): oxytocin, estrogen.
Chapter 10 Muscle Tissue Lecture Outline
Chapter 10 Muscle Tissue Lecture Outline Muscle tissue types 1. Skeletal muscle = voluntary striated 2. Cardiac muscle = involuntary striated 3. Smooth muscle = involuntary nonstriated Characteristics
More informationBIO 2401 MUSCLE TISSUE page 1 MUSCLES AND MUSCLE TISSUE. Striations Present or Absent?
BIO 2401 MUSCLE TISSUE page 1 Types of Muscle MUSCLES AND MUSCLE TISSUE Type of Muscle Skeletal Location of Muscle attaches to and covers bony skeleton Striations Present or Absent? present Control of
More informationMuscles How muscles contract - The Sliding Filament Theory
Muscles How muscles contract - The Sliding Filament Theory A muscle contains many muscle fibers A muscle fiber is a series of fused cells Each fiber contains a bundle of 4-20 myofibrils Myofibrils are
More informationCHAPTER XV PDL 101 HUMAN ANATOMY & PHYSIOLOGY. Ms. K. GOWRI. M.Pharm., Lecturer.
CHAPTER XV PDL 101 HUMAN ANATOMY & PHYSIOLOGY Ms. K. GOWRI. M.Pharm., Lecturer. Types of Muscle Tissue Classified by location, appearance, and by the type of nervous system control or innervation. Skeletal
More informationMuscular System: Muscle Tissue (Chapter 10) Lecture Materials for Amy Warenda Czura, Ph.D. Suffolk County Community College
Muscular System: Muscle Tissue (Chapter 10) Lecture Materials for Amy Warenda Czura, Ph.D. Suffolk County Community College Primary Sources for figures and content: Eastern Campus Marieb, E. N. Human Anatomy
More informationMuscle Tissue. Muscle Physiology. Skeletal Muscle. Types of Muscle. Skeletal Muscle Organization. Myofibril Structure
Muscle Tissue Muscle Physiology Chapter 12 Specially designed to contract Generates mechanical force Functions locomotion and external movements internal movement (circulation, digestion) heat generation
More informationMUSCLE TISSUE. Larry Johnson Texas A&M University
MUSCLE TISSUE Larry Johnson Texas A&M University Objectives Histologically identify and functionally characterize each of the 3 types of muscle tissues. Describe the organization of the sarcomere as seen
More informationMUSCLES AND MUSCLE TISSUE
MUSCLES AND MUSCLE TISSUE The muscular system provides for movement of the body and its parts (as muscles shorten), maintains posture, generates heat and stabilizes joints. The various types of muscles
More informationSmooth Muscle. Learning Objectives.
Smooth Muscle. Learning Objectives. At the end of this course, you should be able to : 1. describe the structure of smooth muscle 2. describe where smooth muscle occurs within the body 3. discuss the structural
More informationMuscles and Contraction
Muscles and Contraction Muscle tissue forms the organs called muscle. Three types of muscle tissue are (1) skeletal, (2) cardiac, and (3) smooth. Anatomy and Physiology Text and Laboratory Workbook, Stephen
More informationChapter 10: Muscles and Muscle Tissue
Chapter 10: Muscles and Muscle Tissue Chapter Objectives OVERVIEW OF MUSCLE TISSUE 1. Describe the three key functions of muscle. 2. Describe the four special properties of muscle tissue. SKELETAL MUSCLE
More informationMuscular System. Skeletal Muscle
Muscular System Overview of Muscle Tissues Types of Muscle Tissue o Skeletal and smooth muscles which are elongated are called muscle fibers o Myo- and Mys- = muscle o Sarco = flesh refers to muscle; i.e.,
More informationMuscle Tissue Muscle tissues are specialized to contract. Muscle cells are connected together, primarily by collagen fibers
Muscle Tissue Muscle tissues are specialized to contract. Muscle cells are connected together, primarily by collagen fibers When a muscle cell contracts t it pulls on the collagen fibers creating tension
More informationSkeletal Muscle Structure & Function.
Skeletal Muscle Structure & Function. Learning Objectives. At the end of this course, you should be able to : 1. describe the structure of skeletal muscle 2. understand the function of a motor unit 3.
More informationBiology 2401 Anatomy and Physiology I Exam 3 Notes- Muscular System Ch. 8
Biology 2401 Anatomy and Physiology I Exam 3 Notes- Muscular System Ch. 8 Functions of the muscular system: movement of body or body parts and materials within the body maintain posture and body position
More informationPractice Chapter 6. Figure 6.3. Multiple Choice Identify the choice that best completes the statement or answers the question.
Practice Chapter 6 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Voluntary muscle tissue is; a. smooth muscle b. skeletal muscle c. dense regular d.
More informationMUSCULAR SYSTEM. A. K. Sengupta 9/9/2010 1/12
MUSCULAR SYSTEM Introduction Functions and basic types of muscle cells Skeletal muscle cells and connective tissues The nervous system Mechanism of muscle contraction Motor unit Action potential basis
More informationUNIT 5 - MUSCULAR SYSTEM LECTURE NOTES
UNIT 5 - MUSCULAR SYSTEM LECTURE NOTES 5.0I MUSCLE TISSUE FUNCTIONS A. Motion by moving the skeletal levers of the body B. Posture - stabilizing body positions C. Regulation of organ volume D. Thermogenesis
More informationMuscles and Muscle Tissue
Overview of Muscle Tissues (pp. 276 277) Types of Muscle Tissue (p. 276) Special Characteristics of Muscle Tissue (p. 276) Muscle Functions (pp. 276 277) Skeletal Muscle (pp. 277 305) Gross Anatomy of
More informationMuscles and Muscle Tissue
Muscles and Muscle Tissue 9 Overview of Muscle Tissues (pp. 280=281) 1. Compare and contrast the basic types of muscle tissue. 2. List four important functions of muscle tissue. Skeletal Muscle (pp. 281=309)
More informationTeppe Treppe: A staircase increase in tension production after repeated simulation, even though the muscle is allowed to relax between twitches.
Part II, Muscle: Mechanisms of Contraction and Neural Control, Chapter 12 Outline of class notes Objectives: After studying part II of this chapter you should be able to: 1. Discuss how contractile force
More information7Muscles. Major Themes. Chapter Objectives. Overview of Muscle 228. Structure of Skeletal Muscle Tissue 231. Muscle Energy 243
7Muscles Major Themes Muscle cells shorten on command; no other cells do. There are three types of muscle cells: skeletal, cardiac, and smooth. Skeletal muscle contracts voluntarily to produce body movements.
More informationMuscles and Muscle Tissue
< 278 UNIT 2 Covering, Support, and Movement of the Body Muscles and Muscle Tissue WHY THIS MATTERS In this chapter, you will learn that Muscles use actin and myosin molecules to convert the energy of
More informationBiological Sciences Initiative. Muscle Contraction
BSI Activity Page 1 Biological Sciences Initiative HHMI Muscle Contraction SUMMARY In this activity, students will play the role of different proteins involved in muscle contraction and act out the process.
More informationAnimal Tissues. I. Epithelial Tissue
Animal Tissues There are four types of tissues found in animals: epithelial tissue, connective tissue, muscle tissue, and nervous tissue. In this lab you will learn the major characteristics of each tissue
More informationVertebrate Body Organization
Vertebrate Body Organization Digestive tube suspended in coelom from mouth to anus Body supported by internal skeleton of jointed bones Vertebrae and Cranium protects nervous system Diaphragm divides coelom
More informationQuestions 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 informationI have also included the questions from the muscular system quiz 7AB and 8 AB in this practice set.
1 Practice Questions for Exam 2 As you prepare for the exam you should review all of your lecture notes, study guides, key medical terms, blood test information, and previous quizzes. The following are
More informationCardiac Muscle. Learning Objectives.
Cardiac Muscle. Learning Objectives. At the end of this course, you should be able to : 1. describe the structure of cardiac muscle 2. understand the concept of the functional syncytium 3. give a basic
More informationSmooth Muscle. Smooth Muscle Structure
Smooth Muscle Spindle-shaped Small (2-5 um wide, 50-300 um long) 1 centrally placed nucleus per cell Usually organized in small to moderate sized clusters of cells Lack sarcomeres No T-tubules or terminal
More informationParts 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 informationModule F SKELETAL SYSTEM & ARTICULATIONS
Module F SKELETAL SYSTEM & ARTICULATIONS Topic from General functions of bone & the skeletal system Structural components microscopic anatomy Structural components gross anatomy Physiology of embryonic
More informationRAD 223. Radiography physiology. Lecture Notes. First lecture: Cell and Tissue
RAD 223 Radiography physiology Lecture Notes First lecture: Cell and Tissue Physiology: the word physiology derived from a Greek word for study of nature. It is the study of how the body and its part work
More informationLecture Outline. Cardiovascular Physiology. Cardiovascular System Function. Functional Anatomy of the Heart
Lecture Outline Cardiovascular Physiology Cardiac Output Controls & Blood Pressure Cardiovascular System Function Functional components of the cardiovascular system: Heart Blood Vessels Blood General functions
More informationbio4050 human anatomy & physiology 1 final exam 29 june 2006
bio4050 human anatomy & physiology 1 final exam 29 june 2006 Please answer all questions on the answer sheet provided Use only the designated letter for your answer; do not write the text as your answer.
More informationSkeletal, Muscular, and Integumentary Systems
Chapter 36 Skeletal, Muscular, and Integumentary Systems Section 36 1 The Skeletal System (pages 921 925) This section describes the skeletal system and its functions. Introduction (page 921) 1. What forms
More informationChapter 7: The Nervous System
Chapter 7: The Nervous System Objectives Discuss the general organization of the nervous system Describe the structure & function of a nerve Draw and label the pathways involved in a withdraw reflex Define
More informationMuscle. HistoNotes LEARNING OBJECTIVES OUTLINE. I. MUSCLE TISSUE A. Muscle cells (myocytes) B. Extracellular matrix
Muscle 8 LEARNING OBJECTIVES OUTLINE I. MUSCLE TISSUE A. Muscle cells (myocytes) B. Extracellular matrix II. CLASSIFICATION OF MUSCLE: TYPES A. Striated: Skeletal 1. Typical skeletal muscle: attached to
More informationChapter 6: The Muscular System
Chapter 6: The Muscular System I. Overview of Muscle Tissues Objectives: Describe the similarities and differences in the structure and function of the three types of muscle tissue, and indicate where
More informationLesson Aim To explain the human body at a microscopic level, including the structure and function of cells, tissues and membranes.
LESSON 1. CELLS & TISSUES Lesson Aim To explain the human body at a microscopic level, including the structure and function of cells, tissues and membranes. THE CELL All living matter is composed of functional
More informationChapter 9: Muscular System
Shier, Butler, and Lewis: Hole s Human Anatomy and Physiology, 10 th ed. Chapter 9: Muscular System Chapter 9: Muscular System I. Structure of a Skeletal Muscle A. Introduction 1. A skeletal muscle is
More informationAP 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 informationNervous Tissue Dr. Archana Rani Associate Professor Department of Anatomy KGMU UP, Lucknow
13.01.2015 Nervous Tissue Dr. Archana Rani Associate Professor Department of Anatomy KGMU UP, Lucknow Introduction Property of irritability and conductivity Respond to various types of stimuli Distributed
More informationThe Tissue Level of Organization
The Tissue Level of Organization Tissues A groups of similar cells, usually having similar embryonic origin and specialized function Histology: the study of tissues Four general types Epithelial Muscle
More information12. 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 informationMUSCULAR SYSTEM REVIEW. 1. Identify the general functions of the muscular system
MUSCULAR SYSTEM REVIEW 1. Identify the general functions of the muscular system 2. Define the four characteristics of muscular tissue a. irritability (excitability) - b. extensibility- c. contractibility
More informationTissues (Histology) Ch. 3 Human Anatomy lecture
I. Histology the study of tissues A. 4 basic tissue types epithelial connective muscle nervous Tissues (Histology) Ch. 3 Human Anatomy lecture B. Usually found in combinations to form organs. C. As you
More informationStructure and Function of the Musculoskeletal System Professor Alan Hedge DEA 3250/6510
Structure and Function of the Musculoskeletal System Professor Alan Hedge DEA 3250/6510 Functions of the Musculoskeletal System Support and protect the body and its organs. Provide motion. Musculoskeletal
More informationPART I: Neurons and the Nerve Impulse
PART I: Neurons and the Nerve Impulse Identify each of the labeled structures of the neuron below. A. B. C. D. E. F. G. Identify each of the labeled structures of the neuron below. A. dendrites B. nucleus
More informationSkeletal Muscle Contraction MUSCLE PHYSIOLOGY. Sliding Filament Model of Contraction. Nerve Stimulus of Skeletal Muscle
Skeletal Muscle Contraction MUSCLE PHYSIOLOGY In order to contract, a skeletal muscle must: Be stimulated by a nerve ending Propagate an electrical current, or action potential, along its sarcolemma Have
More informationChapter 8 - Muscular System 8.1 Introduction (p. 178 ) A. The three types of muscle in the body are skeletal, smooth, and cardiac muscle. B.
Chapter 8 - Muscular System 8.1 Introduction (p. 178 ) A. The three types of muscle in the body are skeletal, smooth, and cardiac muscle. B. This chapter focuses on skeletal muscle. 8.2 Structure of a
More information11 - Types Of Skeletal Muscle Contractions. Taft College Human Physiology
11 - Types Of Skeletal Muscle Contractions Taft College Human Physiology Types Of Skeletal Muscle Contractions Isotonic Contractions: Tension produced and overall shortening of the muscle as a load is
More informationU N IT 10 NE RVOUS SYS TE M REVIEW 1. Which of the following is controlled by the somatic nervous system? A. rate of heartbeat B.
U N IT 10 NE RVOUS SYS TE M REVIEW 1. Which of the following is controlled by the somatic nervous system? A. rate of heartbeat B. contraction of skeletal muscles C. increased blood flow to muscle tissue
More informationBiology 13A Lab #3: Cells and Tissues
Biology 13A Lab #3: Cells and Tissues Lab #3 Table of Contents: Expected Learning Outcomes.... 28 Introduction...... 28 Activity 1: Eukaryotic Cell Structure... 29 Activity 2: Perspectives on Tissue Preparations.
More informationNerves 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 informationCELLS IN THE NERVOUS SYSTEM
NEURONS AND GLIA CELLS IN THE NERVOUS SYSTEM Glia Insulates, supports, and nourishes neurons Neurons Process information Sense environmental changes Communicate changes to other neurons Command body response
More informationMuscle Physiology and the. Pathology of Muscular Dystrophy
Muscle Physiology and the Pathology of Muscular Dystrophy Angela Tompkins February 23, 2010 Everglades University Biology 1 Muscle Physiology and the Pathology of Muscular Dystrophy Humans are able to
More informationBi 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 informationThe Cell Interior and Function
The Cell Interior and Function 5 5.0 CHAPTER PREVIEW Investigate and understand the organization and function of the cell interior. Define the differences between eukaryotic and prokaryotic cell structure.
More informationAnatomy and Physiology for Exercise and Health Level 3
Anatomy and Physiology for Exercise and Health Level 3 A/600/9051 Mock Paper There are 25 questions within this paper To achieve a pass you will need to score 18 out of 25 marks All questions are multiple
More informationCompartmentalization of the Cell. Objectives. Recommended Reading. Professor Alfred Cuschieri. Department of Anatomy University of Malta
Compartmentalization of the Cell Professor Alfred Cuschieri Department of Anatomy University of Malta Objectives By the end of this session the student should be able to: 1. Identify the different organelles
More informationBiology 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 informationMicroscopes. Eukaryotes Eukaryotic cells are characterized by having: DNA in a nucleus that is bounded by a membranous nuclear envelope
CH 6 The Cell Microscopy Scientists use microscopes to visualize cells too small to see with the naked eye. In a light microscope (LM), visible light is passed through a specimen and then through glass
More informationChapter 9 Nervous System
Chapter 9 Nervous System Nervous System function: The nervous system is composed of neurons and neuroglia. at the ends of peripheral nerves gather information and convert it into nerve impulses. When sensory
More informationFigure 6.1. 2) The A band within a skeletal muscle fiber is indicated by letter. Answer: A Diff: 2 Page Ref: 188
Essentials of Anatomy and Physiology, 9e (Marieb) Chapter 6 The Muscular System Short Answer Figure 6.1 Using Figure 6.1, match the following: 1) The I band within a skeletal muscle fiber is indicated
More informationName Date Hour. Nerve Histology Microscope Lab
Name Date Hour Nerve Histology Microscope Lab PRE-LAB: Answer the following questions using your reading and class notes before starting the microscope lab. 1. What is the difference between the functions
More informationBacterial (Prokaryotic) Cell. Common features of all cells. Tour of the Cell. Eukaryotic Cell. Plasma Membrane defines inside from outside
www.denniskunkel.com Tour of the Cell www.denniskunkel.com Today s Topics Properties of all cells Prokaryotes and Eukaryotes Functions of Major Cellular Organelles Information, Synthesis&Transport,, Vesicles
More informationAnaerobic and Aerobic Training Adaptations. Chapters 5 & 6
Anaerobic and Aerobic Training Adaptations Chapters 5 & 6 Adaptations to Training Chronic exercise provides stimulus for the systems of the body to change Systems will adapt according to level, intensity,
More informationBiomechanics of Skeletal Muscle
Oatis_CH04_045-068.qxd 4/18/07 2:21 PM Page 45 CHAPTER 4 Biomechanics of Skeletal Muscle CHAPTER CONTENTS STRUCTURE OF SKELETAL MUSCLE.......................................................................46
More informationNERVOUS SYSTEM B 1. Which of the following is controlled by the somatic nervous system? A. rate of heartbeat B. contraction of skeletal muscles C.
NERVOUS SYSTEM B 1. Which of the following is controlled by the somatic nervous system? A. rate of heartbeat B. contraction of skeletal muscles C. increased blood flow to muscle tissue D. movement of food
More informationHuman Anatomy & Physiology I with Dr. Hubley. Practice Exam 1
Human Anatomy & Physiology I with Dr. Hubley Practice Exam 1 1. Which definition is the best definition of the term gross anatomy? a. The study of cells. b. The study of tissues. c. The study of structures
More informationChapter 15. The Autonomic Nervous. The Autonomic Nervous System. Autonomic Motor Pathways. ANS vs. SNS
The Autonomic Nervous System Chapter 15 The subconscious involuntary nervous system Regulates activity of smooth muscle, cardiac muscle & certain glands The Autonomic Nervous System 1 2 ANS vs. SNS Somatic
More informationPlasma Membrane hydrophilic polar heads
The Parts of the Cell 3 main parts in ALL cells: plasma membrane, cytoplasm, genetic material this is about the parts of a generic eukaryotic cell Plasma Membrane -is a fluid mosaic model membrane is fluid
More informationLecture 4 Cell Membranes & Organelles
Lecture 4 Cell Membranes & Organelles Structure of Animal Cells The Phospholipid Structure Phospholipid structure Encases all living cells Its basic structure is represented by the fluidmosaic model Phospholipid
More informationDr. RAJENDRAN S INSTITUTE OF MEDICAL EDUCATION
Page 1 of 7 Dr. RAJENDRAN S INSTITUTE OF MEDICAL EDUCATION AIIMS NOVEMBER 2012 - QUESTIONS AND ANSWERS PHYSIOLOGY This contains only 3 out of 7 questions. For complete questions with explanatory answers,
More informationAUTONOMIC NERVOUS SYSTEM
AUTONOMIC NERVOUS SYSTEM Somatic efferent and ANS Somatic Efferent Control is over skeletal muscles. External environment This division of the PNS responds to some change in the external environment. single
More informationSection B: Epithelial Tissue 1. Where are epithelial tissues found within the body? 2. What are the functions of the epithelial tissues?
Tissue worksheet Name Section A: Intro to Histology Cells are the smallest units of life. In complex organisms, cells group together with one another based on similar structure and function to form tissues.
More informationCells & Cell Organelles
Cells & Cell Organelles The Building Blocks of Life H Biology Types of cells bacteria cells Prokaryote - no organelles Eukaryotes - organelles animal cells plant cells Cell size comparison Animal cell
More informationBiology 105 Human Biology PRACTICE MIDTERM EXAM 1. Essentials of Anatomy and Physiology, 5e (Martini/Nath) Chapter 4 The Tissue Level of Organization
Essentials of Anatomy and Physiology, 5e (Martini/Nath) Chapter 4 The Tissue Level of Organization Multiple-Choice Questions 1) The four main types of tissues include A) epithelium. B) muscle. C) nerve.
More informationReview of the Cell and Its Organelles
Biology Learning Centre Review of the Cell and Its Organelles Tips for most effective learning of this material: Memorize the names and structures over several days. This will help you retain what you
More informationO ρόλος της ακετυλοχολίνης στη σύσπαση και τον πολλαπλασιασµό των ΛΜΚ (του αναπνευστικού) Απ. Χατζηευθυµίου 2015
O ρόλος της ακετυλοχολίνης στη σύσπαση και τον πολλαπλασιασµό των ΛΜΚ (του αναπνευστικού) Απ. Χατζηευθυµίου 2015 Σύσπαση ΛΜΙ An increase in free intracellular calcium can result from either increased flux
More informationNerves 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 informationBSC 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 informationChapter 13. The Nature of Somatic Reflexes
Chapter 13 The Nature of Somatic Reflexes Nature of Reflexes (1 of 3) A reflex is an involuntary responses initiated by a sensory input resulting in a change in a gland or muscle tissue occur without our
More informationD.U.C. Assist. Lec. Faculty of Dentistry General Physiology Ihsan Dhari. The Autonomic Nervous System
The Autonomic Nervous System The portion of the nervous system that controls most visceral functions of the body is called the autonomic nervous system. This system helps to control arterial pressure,
More informationThe Cell: Organelle Diagrams
The Cell: Organelle Diagrams Fig 7-4. A prokaryotic cell. Lacking a true nucleus and the other membrane-enclosed organelles of the eukaryotic cell, the prokaryotic cell is much simpler in structure. Only
More informationResting 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 informationBiology 101 Chapter 4 Cells as the Basic Unit of Life. The Cell Theory Major Contributors: Galileo = first observations made with a microscope
Biology 101 Chapter 4 Cells as the Basic Unit of Life The Cell Theory Major Contributors: Galileo = first observations made with a microscope Robert Hooke = first to observe small compartments in dead
More informationOveractive bladder is a common condition thought to. women, and is a serious condition that can lead to. significant lifestyle changes.
Overactive bladder is a common condition thought to FADE UP TO WIDE SHOT OF FEMALE MODEL WITH TRANSPARENT SKIN. URINARY BLADDER VISIBLE IN PELVIC REGION affect over 16 percent of adults. It affects men
More informationChapter 20: The Cardiovascular System: The Heart
Chapter 20: The Cardiovascular System: The Heart Chapter Objectives ANATOMY OF THE HEART 1. Describe the location and orientation of the heart within the thorax and mediastinal cavity. 2. Describe the
More informationCells, tissues and organs
Chapter 8: Cells, tissues and organs Cells: building blocks of life Living things are made of cells. Many of the chemical reactions that keep organisms alive (metabolic functions) take place in cells.
More informationCell Structure and Function. Eukaryotic Cell: Neuron
Cell Structure and Function Eukaryotic Cell: Neuron Cell Structure and Function Eukaryotic Cells: Blood Cells Cell Structure and Function Prokaryotic Cells: Bacteria Cell Structure and Function All living
More informationExercise 5 Nervous Tissue
Exercise 5 Nervous Tissue Objectives After completing the laboratory exercise for nervous tissue you should be able to: Introduction Identify a "typical" multipolar neuron in the light microscope. Identify
More informationAutonomic Nervous System Dr. Ali Ebneshahidi
Autonomic Nervous System Dr. Ali Ebneshahidi Nervous System Divisions of the nervous system The human nervous system consists of the central nervous System (CNS) and the Peripheral Nervous System (PNS).
More informationLaboratory 3 Histology
Laboratory 3 Histology Goals: For epithelial tissues: o discuss the major features; o classify based on simple/stratified and squamous/cubodial/columnar; o identify each type by microscopy; o identify
More informationName: 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 informationDigestive System Digestive Tract
Digestive System Digestive Tract Dept. of Histology and Embryology 周 莉 教 授 Introduction of digestive system * a long tube extending from the mouth to the anus, and associated with glands. * its main function:
More informationChapter 6. Components of Elasticity. Musculotendinous Unit. Behavioral Properties of the Musculotendinous Unit. Biomechanics of Skeletal Muscle
Chapter 6 Behavioral Properties of the Musculotendinous Unit 1) extensibility: ability to be stretched or to increase in length 2) elasticity: ability to return to normal resting length following a stretch
More informationBiology 105 Human Biology PRACTICE MIDTERM EXAM 1. Essentials of Anatomy and Physiology, 5e (Martini/Nath) Chapter 7 The Muscular System
Essentials of Anatomy and Physiology, 5e (Martini/Nath) Chapter 7 The Muscular System Multiple-Choice Questions 1) Which of the following is (are) a function of skeletal muscle? A) produce movement B)
More informationCellular Calcium Dynamics. Jussi Koivumäki, Glenn Lines & Joakim Sundnes
Cellular Calcium Dynamics Jussi Koivumäki, Glenn Lines & Joakim Sundnes Cellular calcium dynamics A real cardiomyocyte is obviously not an empty cylinder, where Ca 2+ just diffuses freely......instead
More information