In some cells, an afterpotential occurs because A) the Na⁺ continue to enter the cell after depolarization is finished. B) there is prolonged, elevated permeability to K⁺ during repolarization. C) the sodium-potassium pump is actively exchanging ions across the membrane. D) the extracellular Na⁺ concentration is reduced. E) the permeability to Na⁺ continues longer than necessary.

Question

Quizplus · Accepted Answer

Afterpotential occurs due to prolonged elevated permeability to K⁺ during repolarization, causing hyperpolarization before returning to resting potential.

In Some Cells, an Afterpotential Occurs Because