RMP & Action Potential phys.
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8 Terms
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Stimulus
Any change in the environment of sufficient intensity to excite a nerve.
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RMP
Resting Membrane Potential; the potential difference across the membrane at rest (usually -70mV).
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Causes of RMP
"Selective permeability to K+ (leakage)
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Depolarization
The first stage of the action potential spike; caused by rapid Na+ influx (entry).
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Repolarization
The return to resting potential; caused by K+ efflux (exit).
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Spike Potential
"The rapid
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Ionic Basis of AP
The movement of Na+ into the cell and K+ out of the cell via voltage-gated channels.
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Hyperpolarization
A stage where the membrane potential becomes more negative than the RMP due to slow K+ channel closure.
Note 
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