In Some Cells,an Afterpotential Occurs Because

question 103

Multiple Choice

In some cells,an afterpotential occurs because

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

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