Which of the following statements about an action potential is NOT true?
A) Repolarization occurs when potassium leaves the axon.
B) There is a rapid change in polarity from about -65 mV to about +40 mV during depolarization.
C) An action potential takes 2 to 5 seconds.
D) Depolarization occurs when sodium gates open and allow sodium ions to enter the axon.
E) Potassium gates open after the sodium gates and allow potassium ions to leave the cell.

Question

Quizplus · Accepted Answer

An action potential typically takes only a fraction of a second (less than one millisecond) to occur, not 2 to 5 seconds.

Which of the Following Statements About an Action Potential Is