Which of the following statements about the action potential is false?
A) The rapid depolarization phase is caused by the entry of potassium ions.
B) During the repolarization phase, sodium channels close and potassium channels open.
C) During the depolarization phase, membrane potential becomes positive.
D) In the hyperpolarization phase, membrane potential approaches the potassium equilibrium potential.
E) The rapid depolarization phase is caused by the entry of sodium ions.
Answer: A
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