Functions of the Nervous System

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1 NAME PERIOD MY TEST DATE: STUDY GUIDE UNIT 9 The Human Body NERVOUS SYSTEM TEST FORMAT: 10 Fill-Ins (using word bank) 20 Multiple choice DIAGRAMS: Neuron Brain DIAGRAMS + OPEN RESPONSE: Label the diagram using the word bank provided. EXPLAIN what is represented in the diagram, using the vocabulary from the diagram and other terms appropriate to this unit. Synapse Reflex Arc REFER TO THE VOCABULARY/OUTLNE provided in class (also available on class website and Google Classroom) for additional information (vocabulary terms and main ideas). Functions of the Nervous System 1. What are the main functions of the nervous system? 2. Name the two parts of the nervous system and explain what each part does

2 Neurons 3. THINK VISUALLY Draw and label a diagram of a neuron. Be sure to include the following features in your drawing: axon, axon terminals, cell body, dendrites, myelin sheath, nodes, and nucleus. For Questions 4 8, complete each statement by writing the correct word or words. 4. Neurons that carry impulses from the eyes to the spinal cord and brain are called 5. Motor neurons carry impulses from the brain and spinal cord to and 6. The neuron s cell body has short, branched extensions called which receive impulses from other neurons. 7. In most animals, and of different neurons are clustered in bundles called nerves. 8. The insulating membrane that surrounds a single axon in some neurons is called the.

3 The Nerve Impulse 9. Describe the role of sodium ions in propagating a nerve impulse. For Questions 10 11, use the Visual Analogy comparing falling dominoes to a moving impulse. 10. VISUAL ANALOGY Dominoes require a push to begin falling. What push starts a nerve impulse? 11. What is the threshold of a neuron, and how is it similar to a row of falling dominoes? 12. What are neurotransmitters, and how do they function? Apply the Big idea 13. How is the structure of a neuron suited to its function?

4 The Brain and Spinal Cord Write the letter of the correct answer on the line at the left. 1. What is the main link between the brain and the rest of the body? A. cerebrum B. spinal cord C. cerebellum D. brain stem 2. Which of the following is the best example of a reflex? A. jumping up and down B. running in a race C. slowly putting your foot into cool water D. pulling your hand away from a hot pot 3. Which part of the brain controls blood pressure, heart rate, breathing, and swallowing? A. brain stem B. limbic system C. cerebral cortex D. thalamus 4. Which of the following is a function of the frontal lobe? A. making judgments B. hearing and smelling C. reading and speech D. vision 5. Which part of the brain is the site of intelligence, learning, and judgment? A. brain stem B. cerebellum C. cerebrum D. limbic system For Questions 6-10, match the part of the brain to its function. Part of Brain Function 6. cerebrum A. Coordinates and balances the actions of the muscles 7. cerebellum B. Regulates the flow of information between the brain 8. brain stem and the rest of the body 9. thalamus C. Controls voluntary activities of the body 10. hypothalamus D. Controls hunger, thirst, fatigue, anger, and body temperature E. Receives and relays messages from the sense organs

5 11. What connects the two hemispheres of the brain? 12. Identify the four lobes of the brain and their functions. 13. Complete a flowchart showing the reflex arc that occurs when you step on a sharp object. Sensory receptors react to a stimulus and send an impulse to sensory neurons. VOCABULARY: (You don t have to fill this in J) Peripheral nervous system (PNS) Central nervous system (CNS) Cell body

6 Dendrite Axon Myelin sheath Resting potential Action potential Threshold Synapse Neurotransmitter Reflex Cerebrum Cerebral cortex Thalamus Hypothalamus Cerebellum Brain stem Meninges Somatic nervous system Autonomic nervous system Reflex arc

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