The relative refractory period occurs because
A) the cell is hyperpolarized, requiring a larger than normal stimulus in order to form another action potential.
B) it takes time for the sodium-potassium pumps to return ion concentrations to the normal resting state.
C) only one action potential at a time can travel the length of an axon.
D) sodium channels cannot reopen until the cell regains its resting potential.

Question

Quizplus · Accepted Answer

During the relative refractory period, the cell is hyperpolarized which means that the membrane potential is more negative than the resting potential. This requires a larger than normal stimulus to generate another action potential. Once the membrane potential returns to the resting state, it can generate another action potential.

The Relative Refractory Period Occurs Because