The absolute refractory period ends when A) inactivation gates of voltage-gated Na⁺ channels reopen. B) activation gates of voltage-gated Na⁺ channels reopen. C) the sodium-potassium pump stops. D) voltage-gated K⁺ channels open. E) None of the choices are correct.

Question

Quizplus · Accepted Answer

The absolute refractory period ends when the inactivation gates of voltage-gated Na+ channels reopen, allowing these channels to return to a state where they can be activated again. This is crucial for the initiation of another action potential.

The Absolute Refractory Period Ends When