The Falling Phase of the Action Potential Is Due Primarily

Multiple Choice

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.