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 -70mV to about +40mV
B) It can be produced by an electric shock or sudden pH change
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