What stops the rising phase of the action potential? A) The K⁺ gate closes. B) The Na⁺ activation gate opens. C) The Na⁺ inactivation gate closes. D) The Na⁺ inactivation gate opens. E) The sodium activation gate closes.

Question

Quizplus · Accepted Answer

The rising phase of the action potential is caused by the influx of sodium ions into the cell through the Na⁺ channel. The inactivation gate of this channel closes after a brief period of time, preventing further influx of sodium ions and stopping the rising phase of the action potential.

What Stops the Rising Phase of the Action Potential