The hyperpolarization phase of the action potential is due to?: (A) Opening of voltage-gated Cl- channels, (B) Prolonged opening of voltage-gated K+ channels, (C) Closure of resting Na-t- channels, (D) Closure of Cl- channels
Answer is B. ANSWER: (B) Prolonged opening of voltage-gated K+ channelsREF: Guyton's physiology 12th ed page 61, BRS physiology 4th ed page 11See Physiology 2013 Session 2 for "IONIC BASIS OF NERVE ACTION POTENTIAL"