Which Statement Is NOT True About the Development of an Action

Multiple Choice

Which statement is NOT true about the development of an action potential?

A) There is a rapid change in polarity from about -65 mV to about +40 mV.
B) It requires two types of gated channels.
C) The action potential ends when the polarity across the membrane reaches +40 mV.
D) Depolarization occurs when sodium gates open and allow sodium ions to enter the cell.
E) Potassium gates open after the sodium gates and allow potassium ions to leave the cell.