Which of the Following Happens as the Action Potential Reaches

Question

Which of the following happens as the action potential reaches its peak? A) The inactivation gates of Na⁺ channels close. B) The activation gates of Na⁺ channels close. C) The inactivation gates of Na⁺ channels open. D) Na⁺/K⁺ active transport pumps are activated.

Accepted Answer

As the action potential reaches its peak, the inactivation gates of sodium (Na+) channels close, preventing further influx of Na+ and beginning the process of repolarization.