Human Anatomy & Physiology: A&P Chapter 12 The Central Nervous System Flashcards


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Mastering A&P Human Anatomy & Physiology 10th Edition Marieb
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1

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2

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3

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8

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11

Which of the following is not a function of astrocytes?

provide the defense for the CNS

12

The nodes of Ranvier are found only on myelinated, peripheral neuron processes.

False

13
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Which result of the stimulus applied is the likely cause of the response observed in the left graph?

opening of gated Na+ channels

14
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What major ion currents occur at the point along the action potential phase labeled D?

diffusion of K+ out of the axon through gated ion channels

15

A second nerve impulse cannot be generated until ________.

the membrane potential has been reestablished

16

In what way does the interior surface of a cell membrane of a resting (nonconducting) neuron differ from the external environment? The interior is ________.

negatively charged and contains less sodium

17

Strong stimuli cause the amplitude of action potentials generated to increase.

False

18
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What event is depicted in the structure labeled A?

movement of Ca2+ into the interior of the axonal terminus through voltage-gated channels

19

Opening K+ or Cl- channels in a postsynaptic membrane would produce an inhibitory postsynaptic potential (IPSP).

True

20

An inhibitory postsynaptic potential (IPSP) is associated with ________.

hyperpolarization