Question

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.

Answer 1

Answer:

Option (1).

Explanation:

Action potential may be defined as the change in the cell potential that helps in the transmission of the nerve impulse. The resting membrane potential of the cell is -70mV.

The depolarization phase of the cell has membrane potential towards more positive. After the depolarization phase, the sodium channels are closed and potassium influx occurs that causes the re-polarization of the cell. This activity of the re-polarization is not the consequence of the closing of the inactivation gates.

Thus, the correct answer is option (1).