After an action potential, _____, ensuring that the action potential flows in only one direction.
A)potassium ions flow into the cell
B)potassium channels are unable to open
C)sodium channels are unable to open for a brief period
D)sodium channels remain open
E)the neuron reaches threshold potential

Question

Quizplus · Accepted Answer

After an action potential, sodium channels remain inactivated for a brief period, preventing the backward flow of the action potential. This is called the refractory period. Potassium channels also open and repolarize the membrane, but it is the inactivation of sodium channels that ensures that the action potential flows in only one direction.

After an Action Potential, _____, Ensuring That the Action Potential