During the Refractory Period, an Active Chemical Pump in the Cell

Multiple Choice

During the refractory period, an active chemical pump in the cell membrane:

A) initiates the action potential when it pumps potassium into and sodium out of the neuron.
B) initiates the action potential when it pumps sodium into and potassium out of the neuron.
C) restores the resting potential when it pumps potassium into and sodium out of the neuron.
D) restores the resting potential when it pumps sodium into and potassium out of the neuron.