An action potential on a neuron develops when A) threshold voltage is reached on an axon B) voltage-gated Na⁺ channels open C) spatial and/or temporal summation of graded potentials occurs to a great enough degree D) the axon hillock reaches threshold E) all of these

Question

Quizplus · Accepted Answer

All of the options listed are essential steps in the development of an action potential. The neuron must receive enough input through spatial and/or temporal summation of graded potentials to reach threshold, at which point voltage-gated Na+ channels open and the axon hillock depolarizes, initiating the action potential.

An Action Potential on a Neuron Develops When