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

Question

Quizplus · Accepted Answer

The threshold potential of a membrane is the minimum depolarization needed to operate the voltage-gated sodium and potassium channels, allowing for the initiation of an action potential. This is because at the threshold potential, enough sodium channels open to create a positive feedback loop that rapidly depolarizes the membrane and generates an action potential. Choices A, B, C, and E do not accurately describe the threshold potential.

The "Threshold" Potential of a Membrane Is the