Action Potentials Flashcards

1
Q

Polarized

A

One side of plasma membrane has a different charge than the other (at rest)

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2
Q

Resting potential

A

Axon is not conducting impulse, -70mv

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3
Q

Sodium potassium pump

A

Active transport, 3 K+ pumped in and 2 Na+ pumped out

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4
Q

Action potential

A

Rapid change in polarity

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5
Q

Depolarization

A

Inside of plasma membrane is more + than the outside

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6
Q

Repolarization

A

Inside returns to -

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7
Q

Sodium and potassium gates

A

Voltage activated that change in shape, allowing K+ and Na+ to freely flow

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8
Q

Steps of an action potential

A

Resting potential, depolarization (+40mv), repolarization, afterpolarization (below -70mv then back to -70mv)

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9
Q

Self propagating

A

Ion channels are prompted to open when membrane depolarizes

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10
Q

An action potential is considered…

A

All or nothing

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