PCQ9 Flashcards

1
Q

hyperpolarization

A

some K+ channels remain open, and Na+ channels rest

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2
Q

threshold stimulus

A

any stimulus at or above this level will result in action potential

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3
Q

repolarization

A

Na+ channels are inactivating, and voltage-gated K+ channels open

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4
Q

depolarization

A

voltage-gated Na+ channels open

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5
Q

secretory zone

A

axon terminals release neurotransmitters

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6
Q

receptive region

A

receives stimuli

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7
Q

trigger zone

A

area where nerve impulse is generated

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8
Q

secretory region

A

plasma membrane exhibits voltage-gated Ca2+ channels

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9
Q

conducting region

A

plasma membrane exhibits voltage-gated Na+ and K+ channels

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10
Q

parallel after-discharge circuit

A

may be involved in complex, exacting types of mental processing

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11
Q

converging circuit

A

different types of sensory input can have the same ultimate effect

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12
Q

diverging circuit

A

one incoming axon triggers responses in ever-increasing numbers farther and farther along circuit

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13
Q

reverberating circuit

A

involved in activating fibers of a skeletal muscle such as the biceps

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14
Q

Reflexes are rapid, automatic responses to stimuli that will produce the same effect every time.

A

True

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15
Q

During depolarization, the inside of the neuron’s membrane becomes less negative.

A

True

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16
Q

Strong stimuli cause the amplitude of action potentials generated to increase

A

False

17
Q

The all-or-none phenomenon as applied to nerve conduction states that the whole nerve cell must be stimulated for conduction to take place.

A

False