In Some Cells, an Afterpotential Occurs Because

question 151

Multiple Choice

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.

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