Identify the Correct Sequence of Steps in the Generation of an Action

Multiple Choice

Identify the correct sequence of steps in the generation of an action potential. 1. Activation of sodium channels and rapid depolarization
2) Inactivation of sodium channels and activation of potassium channels
3) Depolarization to threshold
4) Closing of potassium channels

A) 1, 3, 4, 2
B) 3, 1, 2, 4
C) 4, 3, 2, 1
D) 1, 3, 2, 4
E) 3, 1, 4, 2