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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.
user
The phase of after depolarization is characterized by:
assistant
The correct answer is  The slower rate of repolarization toward the later pa has been described as After depolarization. The initial rate of repolarization is rapid. This is due to a greater concentration gradient for K+ to move out. However, as the K+ moves out, two things happen: Concentration gradient for K+ will narrow. Thus, rate of K+ efflux will decrease. The K+ that moved out will cause accumulation of positive charges (carried by K+) just on the outside of the membrane.