Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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Nodes
of Ranvier a. | strengthen
axons. | c. | occur in
malfunctioning axons. | b. | slow nerve impulses. | d. | are gaps in the myelin sheath. | | | | |
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2.
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When
a neurotransmitter is released from a presynaptic neuron, the neurotransmitter may a. | become an enzyme
in the space between the neurons. | b. | bind to membrane receptor proteins on the membrane of the
postsynaptic neuron. | c. | cover the membrane of the axon. | d. | cause the cell
body of the postsynaptic neuron to enlarge. | | |
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3.
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Sensory receptors essential for balance are located in the a. | eyes. | c. | cochlea of the
inner ear. | b. | eardrum. | d. | semicircular canals. | | | | |
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4.
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Specialized receptors that enable hearing are found in the a. | cornea. | c. | cochlea. | b. | semicircular canals. | d. | cerebellum. | | | | |
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5.
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Narcotics affect the nervous system’s control of pain perception
by a. | blocking
dopamine reabsorption. | c. | inhibiting
dopamine production. | b. | mimicking cocaine. | d. | mimicking enkephalins. | | | | |
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