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Multiple Choice Quiz
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1
A distinctive feature of a neuron is its
A)ability to nourish, insulate, help repair damage, and generally support neural functioning.
B)distinctive shape, which looks like twisted tree branches.
C)ability to maintain homeostasis and regulate vital behavior.
D)ability to communicate with other cells and transmit information across relatively long distances.
2
Which of the following is not a part of a neuron?
A)dendrite
B)glial
C)nucleus
D)axon
3
A myelin sheath cannot
A)prevent messages from short-circuiting one another.
B)increase the velocity with which the electrical impulses (that carry the messages) travel through the axons.
C)insulate axons.
D)fire neurons.
4
Just after an action potential has passed through a section of the axon, the cell membrane in that region cannot admit positive ions again for a few milliseconds, and so
A)the neuron cannot fire again immediately.
B)a second impulse travels along the axon more slowly.
C)the neuron will fire again immediately.
D)the neuron is in a normal resting state
5
One class of neurotransmitters consisting of a family of chemicals produced by the brain that are similar in structure to painkilling drugs is
A)gamma-amino butyric acid.
B)serotonin.
C)acetylcholine.
D)endorphins.





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