At the Peak of an Action Potential

question 136

Multiple Choice

At the peak of an action potential:

• A) The electrical gradient for Na⁺ causes a net movement of this ion out of the cell.
• B) The concentration gradient for K⁺ tends to move this ion out of the cell.
• C) K⁺ permeability greatly increases.
• D) All of these.
• E) The concentration gradient for K⁺ tends to move this ion out of the cell, and K⁺ permeability greatly increases.

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