The depolarization phase of an action potential is punctuated by the closing of inactivation gates in the voltage gated sodium ion channels.All of the following are consequences of this inactivation except one.Choose the statement below that is not a consequence of the closing of inactivating gates.
A) This allows for the efflux (diffusion out) of potassium ions, resulting in the repolarization of the cell.
B) This allows for the one way transmission of action potential down the axon.
C) This limits the frequency of action potentials down the axon.
D) This stops the depolarization of the axon membrane.

Question

Quizplus · Accepted Answer

The closing of inactivation gates in voltage-gated sodium ion channels directly leads to the cessation of sodium influx, contributing to the stopping of depolarization, limiting the frequency of action potentials, and ensuring one-way transmission of the action potential. However, the efflux of potassium ions, which is crucial for repolarization, is primarily facilitated by the opening of voltage-gated potassium channels, not directly by the closing of sodium channel inactivation gates.

The Depolarization Phase of an Action Potential Is Punctuated by the Closing