Regarding the action potential which is NOT true? A. The threshold is reached wh

Question

Regarding the action potential which is NOT true?
A. The threshold is reached when sodium influx equals potassium efflux
B. Permeability to sodium increases to approximately 10 times that of potassium and
the membrane potential approaches the nernstian potential for sodium.
- 3 -
C. The declining (potential going more negative) phase of the action potential is largely
due to the action of the sodium potassium ATPase.
D. The undershoot is due largely to opening of voltage gated potassium channels.
E. None of the above

Explanation / Answer

B. Permeability to sodium increases to approximately 10 times that of potassium and the membrane potential approaches the nernstian potential for sodium. - 3 -

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