BMS100 Past Test Questions
Chapter 9, Fall 2008

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1. Which part of a motor neuron is located entirely in the central nervous system?
   1. cell body
   2. most of axon
   3. terminal portion of axon
   4. both A and B
   5. both B and C
   
   
2. The peripheral nervous system consists of
   1. the spinal nerves only
   2. the spinal cord and the spinal nerves
   3. the cranial nerves and the spinal nerves
   4. the nerves that control automatic (involuntary) functions
   
   
3. Sensory neurons conduct action potentials (electrical signals) to or toward
   1. the central nervous system
   2. receptors in skin, sense organs, etc.
   3. muscle fibers, cells in glands, etc.
   
   
4. What is the typical sequence in the passage of electrical signals through a neuron?
   1. axon > cell body > dendrites
   2. dendrites > axon > cell body
   3. dendrites > cell body > axon
   4. cell body > axon > dendrites
   5. cell body > dendrites > axon
   
   
5. The function of neurons requires
   1. high concentrations of both sodium and potassium inside the cell
   2. high concentrations of both sodium and potassium outside the cell
   3. high concentration of sodium inside cell and high concentrations of potassium outside cell
   4. high concentration of sodium outside cell and high concentrations of potassium inside cell
   
   
6. When a neuron is not conducting an action potential (nerve signal)
   1. the inside of the cell is neither positive nor negative
   2. the inside of the cell is positive relative to the outside
   3. the inside of the cell is negative relative to the outside
   
   
7. In a region of the axon where sodium gates are open
   1. sodium flows into the axon and the interior becomes more positive temporarily
   2. sodium flows into the axon and the interior becomes more negative temporarily
   3. sodium flows out of the axon and the interior becomes more positive temporarily
   4. sodium flows out of the axon and the interior becomes more negative temporarily
   
   
8. Which one of the following is true of the sodium gates of axons?
   1. Sodium gates are "voltage-sensitive" (they open if the axon becomes positive inside).
   2. The flow of sodium through the membrane in one region of an axon can cause nearby sodium gates to open.
   3. The function of sodium gates causes the action potential (nerve signal) to pass along the axon in an "all-or-none" manner.
   4. All of the above are true.
   5. None of the above is true.
   
   
9. Which one of the following is most responsible for terminating ("ending") a nerve action potential?
   1. opening of potassium channels (gates)
   2. closing of potassium channels (gates)
   3. opening of calcium channels (gates)
   4. closing of calcium channels (gates)
   
   
10. The cerebrum
    1. consists of two hemispheres that are connected by the cerebral cortex
    2. consists of two hemispheres that are connected by the corpus callosum
    3. consists of two hemispheres that are connected by the brainstem
    4. consists of two hemispheres that are connected by the peripheral nervous system
    5. consists of two hemispheres that are not connected
    
    
11. In many people, the _?_ is located in the left cerebral hemisphere only.
    1. primary visual area
    2. primary auditory area
    3. primary motor area
    4. motor speech area
    
    
12. Before it is consciously perceived, most sensory data is "preprocessed" and filtered by the
    1. thalamus
    2. hypothalamus
    3. corpus callosum
    4. primary sensory areas of the cerebral cortex
    
    
13. Consciousness and intelligent thought occur
    1. only in the cerebellum
    2. only in the "vital centers" of the brainstem
    3. only in the deeper, white matter parts of the cerebrum
    4. only in the cerebral cortex (gray matter on the surface of the cerebrum)
    5. in both white matter and gray matter throughout the brain
    
    
14. The hypothalamus does not play a major role in
    1. generating emotions
    2. regulating body temperature
    3. regulation of food and fluid intake and control of digestion
    4. balance and smooth, coordinated skeletal muscle contractions
    5. controlling various glands including many of the endocrine glands
    
    
15. Damage to the brainstem may interfere with _?_ and thereby become life-threatening or fatal.
    1. regulation of body temperature
    2. digestive and urinary functions
    3. balance, equilibrium, and coordination
    4. breathing and control of blood pressure
    5. filtering of visual and auditory (sound) input
    
    
16. The cerebellum does all of the following except
    1. produce signals that pass directly into spinal cord and initiate the "intent" to move voluntarily
    2. receive a "copy" of the pattern of signals for a planned movement
    3. receive information about the actual position of the body and degree of movement
    4. produce "corrective feedback" that modifies the pattern of motor signals for enhanced movement