What happens to the magnitude of an action potential as it is propagated down an excitable membrane and why?

Question

Quizplus · Accepted Answer

The magnitude of an action potential remains constant as it is propagated down an excitable membrane because it follows the all-or-nothing principle, meaning that once the threshold for firing is reached, the action potential will occur at a constant magnitude regardless of the strength of the stimulus.

What Happens to the Magnitude of an Action Potential as It