In excitable cells, which of the following processes is primarily responsible for repolarization?

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Sodium ions moving out of the cellSodium ions entering the cellPotassium ions exiting the cellPotassium ions entering the cell

Explanation

Repolarization in excitable cells occurs mainly due to the movement of potassium ions out of the cell (potassium efflux), which restores the resting membrane potential after depolarization.