During the peak of the action potential, which of these ions has the greatest permeability
A)sodium
B)potassium
C)calcium
D)chloride

Question

Quizplus · Accepted Answer

During the peak of the action potential, potassium channels are open and potassium ions flow out of the cell, resulting in a high permeability for potassium. Sodium channels have already closed and calcium channels are not significant in the depolarization phase, so they are not as permeable as potassium. Chloride ions do not play a major role in the action potential.

During the Peak of the Action Potential, Which of These