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Action Potential
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Chemistry
AP Chemistry
AP Chemistry
Action Potential
Membrane Potential
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12 Terms
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Depolarization
________: a sudden change in membrane potential- usually from a (relatively) negative to positive internal charge.
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K+ ions
As ________ are more concentrated inside the neuron, opening potassium channels causes a passive efflux of potassium.
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Repolarization
________: the restoration of a membrane potential following depolarization (i.e.
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Na+ ions
As ________ are more concentrated outside of the neuron, the opening of sodium channels causes a passive influx of sodium.
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Refractory period
________: the period of time following a nerve impulse before the neuron is able to fire again.
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normal resting state
In a(n) ________, sodium ions are predominantly outside the neuron and potassium ions mainly inside (resting potential)
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efflux of potassium
The ________ causes the membrane potential to return to a more negative internal differential (repolarization)
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sodium potassium
Before a neuron can fire again, the resting potential must be restored via the antiport action of the ________ pump.
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Repolarization
the restoration of a membrane potential following depolarization (i.e
10
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Refractory period
the period of time following a nerve impulse before the neuron is able to fire again
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Nerve impulses
action potentials that move along the length of an axon as a wave of depolarization
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Threshold potential
the level required to open voltage-gated ion channels
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