Which of the Following is True About Threshold for an Action

Question

Which of the following is true about threshold for an action potential?
A) It is more positive than the resting membrane potential.
B) Voltage-gated potassium channels begin to close.
C) Voltage-gated potassium channels begin to open.
D) The membrane begins to hyperpolarize.
E) Threshold for a typical neuron is approximately -30 mV.

Accepted Answer

The threshold for an action potential is more positive than the resting membrane potential, which is typically around -70 mV. When the membrane potential reaches this threshold, voltage-gated sodium channels open, leading to depolarization.