In the process of continuous action potential propagation,
A) the action potential is triggered by graded depolarization of the initial segment.
B) at threshold, sodium channels begin to open rapidly.
C) local currents depolarize the region just adjacent to the active zone.
D) all of the above
E) none of the above

Question

Quizplus · Accepted Answer

In the process of continuous action potential propagation, all three statements are true. A graded depolarization of the initial segment triggers the action potential, at threshold sodium channels open rapidly, and local currents depolarize the region just adjacent to the active zone, leading to the propagation of the action potential along the length of the axon. Therefore, the correct choice is D.

In the Process of Continuous Action Potential Propagation