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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When
an impulse moves down the axon, a. | sodium ions first rush out of the
cell. | b. | a small part of the axon momentarily reverses its
polarity. | c. | the resting potential of the cell does not
change. | d. | potassium ions are pumped into the
axon. | | |
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2.
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Refer
to the illustration above. Which labeled object in the diagram would be responsible for removing
neurotransmitters from the synaptic cleft?
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3.
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Refer
to the illustration above. The effect of the neurotransmitter might be prolonged by the presence of
molecule
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4.
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Sensory neurons transmit messages a. | from the central nervous system to a muscle or
gland. | b. | from the brain to the spinal cord. | c. | to the spinal
cord or brain. | d. | All of the above | | |
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5.
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The
spinal cord is linked to the peripheral nervous system through a. | spinal
nerves | c. | interneurons | b. | the thalamus | d. | All of the above | | | | |
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