An Action Potential Occurs When

Multiple Choice

An action potential occurs when:

A) sodium ions enter the axon's interior, causing a brief positive electrical impulse.
B) potassium ions are electrically transformed into sodium ions.
C) polarized dendrites stimulate adjoining nodes of Ranvier.
D) potassium ions enter the dendrites and sodium ions exit the axon, causing depolarization and a brief negative electrical charge.