The falling phase of the action potential is due primarily to A) Na⁺ flow in the cell only. B) Na⁺ flow out of the cell only. C) K⁺ flow out of the cell only. D) K⁺ flow into the cell only. E) Na⁺ flow out of the cell and K⁺ flow into the cell.

Question

Quizplus · Accepted Answer

The falling phase of the action potential is primarily due to the efflux of K⁺ ions out of the cell, which repolarizes the membrane.

The Falling Phase of the Action Potential Is Due Primarily