Which of the following statements about action potentials is correct?

Question

Quizplus · Accepted Answer

Action potentials are propagated down the length of the axon, from the cell body to the axon terminal. Option A is incorrect because action potentials have a fixed magnitude known as the threshold of excitation. Option B is incorrect because action potentials have a fixed duration of about 1 millisecond. Option D is incorrect because the movement of ions during the action potential occurs through voltage-gated ion channels, not the Na⁺ pump. Option E is incorrect because the speed of action potentials can vary between neurons and types of cells.

Which of the Following Statements About Action Potentials Is Correct