Bio 207 Nervous system Quiz With Answers.An unmyelinated nerve fiber is ______, whereas a myelinated nerve fiber is ______.
Select one:
a. gray, and
... [Show More] composing the gray matter of the brain and spinal cord; white, and composing the white
matter of the brain and spinal cord
b. white, and composing the gray matter of the brain and spinal cord; gray, and composing the white
matter of the brain and spinal cord
c. white, and composing the white matter of the brain and spinal cord; gray, and composing the gray
matter of the brain and spinal cord
d. white, and composing the gray matter of the brain and spinal cord; red, and composing the white
matter of the brain and spinal cord
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The correct answer is: gray, and composing the gray matter of the brain and spinal cord; white, and
composing the white matter of the brain and spinal cord
Question 2
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When an action potential passes over the surface of a synaptic knob, what causes the contents of the
vesicles to be released?
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3
Select one:
a. calcium ions.
b. neuropeptides.
c. sodium ions.
d. neurotransmitters.
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The correct answer is: calcium ions.
Question 3
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What is the most basic level of CNS function?
Select one:
a. spinal reflex
b. ability to work
c. ability to talk
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d. cerebral reflex
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The correct answer is: spinal reflex
Question 4
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What produces cerebrospinal fluid? For what purpose?
Select one:
a. dura mater; maintain a stable ionic concentration in the CNS
b. capillaries in the dura mater of the ventricles; moisten the surface of the brain
c. arachnoid villi in the dura sinus; provide a pathway to the blood for waste
d. choroid plexuses in the ventricles; protect the brain from blows to the skull
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The correct answer is: choroid plexuses in the ventricles; protect the brain from blows to the skull [Show Less]