The Falling Phase of the Action Potential Is Due Primarily

question 120

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.

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