Which one of the following is the correct sequence of events that correlates to the sequence of events of a nerve impulse?
1) the membrane becomes depolarized
2) sodium channels open and sodium ions diffuse inward
3) the membrane becomes repolarized
4) potassium channels open and potassium ions diffuse outward while sodium is actively transported out of the cell
A) 3, 2, 4, 1
B) 2, 1, 4, 3
C) 2, 1, 3, 4
D) 1, 2, 4, 3
E) 4, 1, 3, 2

Question

Quizplus · Accepted Answer

The correct sequence of events for a nerve impulse is: sodium channels open and sodium ions diffuse inward (2), causing the membrane to become depolarized (1). Then, potassium channels open and potassium ions diffuse outward while sodium is actively transported out of the cell (4), leading to the membrane becoming repolarized (3).

Which One of the Following Is the Correct Sequence of Events