The "threshold" potential of a membrane is the ________.
A) lowest frequency of action potentials a neuron can produce
B) minimum hyperpolarization needed to prevent the occurrence of action potentials
C) minimum depolarization needed to operate the voltage-gated sodium and potassium channels
D) peak amount of depolarization seen in an action potential

Question

Quizplus · Accepted Answer

The threshold potential is the minimum depolarization needed to operate the voltage-gated sodium and potassium channels, leading to the initiation of an action potential. Choice A is incorrect because the threshold potential does not determine the frequency of action potentials, but rather whether they will occur at all. Choice B is incorrect because hyperpolarization, not depolarization, is required to prevent action potentials. Choice D is incorrect because the threshold potential is not a measure of peak depolarization, but rather the minimum amount of depolarization needed to initiate an action potential.

The "Threshold" Potential of a Membrane Is the ________