Refer to the following graph of an action potential to answer the question.

At label ________, the cell is not hyperpolarized; however, repolarization is in progress, as the sodium channels are inactivated or becoming inactivated, and many potassium channels have opened.
A) B
B) C
C) D
D) E

Question

Refer to the following graph of an action potential to answer the question.

At label ________, the cell is not hyperpolarized; however, repolarization is in progress, as the sodium channels are inactivated or becoming inactivated, and many potassium channels have opened.
A) B 
B) C 
C) D 
D) E

Quizplus · Accepted Answer

Label B represents the phase of action potential known as the "falling phase" or "repolarization." During this phase, sodium channels are inactivated or becoming inactivated, and many potassium channels have opened. The membrane potential is not hyperpolarized yet, but it is returning towards the resting membrane potential.

Refer to the Following Graph of an Action Potential to Answer