The all -or -none principle, associated with the action potential, states that
A) following an action potential, the membrane will be repolarized by the opening of a potassium channel.
B) all of the action potentials will be generated from the axon hillock.
C) the positive feedback loop for the sodium channel is terminated by the inactivation gate.
D) once membrane potential reaches threshold, an action potential will be generated and that action potential will always be the same magnitude.
E) there is a positive feedback loop for sodium channels that results in a rapid membrane depolarization.

Question

Quizplus · Accepted Answer

The all-or-none principle states that once the threshold is reached, an action potential of a fixed magnitude will always be generated, regardless of how much the stimulus exceeds the threshold.

The All -Or -None Principle, Associated with the Action Potential