After the action potential reaches its maximum,membrane channels return to their original state and _____ flow(s)_____ the cell.
A)sodium;into
B)protein ions;into
C)chloride ions;out of
D)potassium;out of

Question

Quizplus · Accepted Answer

After the action potential reaches its maximum, potassium channels open and potassium ions flow out of the cell, leading to repolarization of the membrane potential. Sodium ions also flow back out of the cell, but through different channels and during a later phase of the action potential. Protein ions and chloride ions do not play a significant role in the repolarization of the membrane potential.

After the Action Potential Reaches Its Maximum,membrane Channels Return to Their