Neurons, Nervous System, And Signal Transmission Practice Test

What is repolarization?

Membrane becomes more positive Membrane returns to negative Membrane becomes more negative than resting Membrane remains depolarized

Correct Answer:

Membrane returns to negative

Explanation:

Repolarization is the phase of an action potential when the membrane potential returns toward the negative resting value after depolarization. As the spike peaks, voltage-gated Na+ channels inactivate and K+ channels open, allowing K+ to exit the cell. This outward current makes the inside more negative, driving the membrane back from a positive peak toward the resting potential (often dipping briefly below resting, then stabilizing). So the best description is that the membrane returns to negative. Depolarization would be the membrane becoming more positive, hyperpolarization would be briefly more negative than resting, and remaining depolarized would mean it hasn’t returned to rest.

Access more questions from this quiz

Continue to Neurons, Nervous System, and Signal Transmission Practice Test for more practice questions and the full quiz experience.

Access More Questions