What Is the Correct Sequence of Events Along an Axon That

Multiple Choice

What is the correct sequence of events along an axon that follows a membrane reaching threshold potential? 1. The membrane depolarizes.
2) Sodium channels open and sodium ions diffuse inward.
3) The membrane repolarizes.
4) Potassium channels open and potassium ions diffuse outward.

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