During the peak of the action potential, the membrane becomes most permeable to
A)sodium
B)potassium
C)calcium
D)chloride
E)protein

Question

Quizplus · Accepted Answer

During the peak of the action potential, the membrane becomes most permeable to potassium ions. This is due to the opening of voltage-gated potassium channels, allowing K+ ions to move out of the cell, which repolarizes the membrane potential back towards resting levels.

During the Peak of the Action Potential, the Membrane Becomes