Direct-acting neurotransmitters ____________.
a. require cyclic AMP
b. mediate very slow responses
c. open ion channels to provoke rapid responses
d. act through second messengers |
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Answer c. (pg. 409)
Direct-acting neurotransmitters open ion channels to provoke rapid responses. |
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Which of the following is correct relative to Ohm's Law?
a. I = R / V
b. Current is directly proportional to the voltage
c. R = V + 1
d. The more intense the stimulus, the more voltage changes |
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Answer: b (pg. 398)
Which of the following is correct relative to Ohm's Law?
b. Current is directly proportional to the voltage |
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Ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid are called _____.
a. ependymal cells
b. Schwann cells
c. oligodendrocytes
d. astrocytes |
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Answer: a (pg.391)
Ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid are called ependymal cells. |
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The sheath of Schwann is also called the ____.
a. myelin sheath
b. axolemma
c. neurilemma
d. white matter |
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Answer: c (pg. 394)
The sheath of Schwann is also called the neurilemma. |
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Bipolar neurons are commonly ________.
a. motor neurons
b. called neuroglial cells
c. found in ganglia
d. found in the retina of the eye |
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Answer: D (pg. 395)
Bipolar neurons are commonly found in the retina of the eye. |
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An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is _____.
a. cholinesterase
b. norepinephrine
c. acetylcholine
d. gamma aminobutyric acid (GABA) |
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Answer: c (pg. 422)
An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is acetylcholine. |
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A neural circuit in which a single impulse is transmitted over and over is a _____.
a. diverging circuit
b. converging circuit
c. reverberating circuit
d. repetitive circuit |
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Answer: c (pg. 422)
A neural circuit in which a single impulse is transmitted over and over is a reverberating circuit. |
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