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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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The repolarization phase of an action potential is due to
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The correct answer is  There is a decrease in sodium permeability (inactivation of the sodium channels) and a delayed increased in potassium permeability during the repolarization phase of the action potential. The pump plays no direct role in the action potential.