Once a threshold is reached,
A) the number of sodium gates that open depends upon the strength of a stimulus.
B) a graded local potential will be unable to spread to a trigger zone of the nerve membrane.
C) the resting potential of a neuron is restored.
D) the potassium channels in the input zone open.
E) the opening of sodium gates and the accompanying flow of sodium ions is an example of positive feedback.

Question

Quizplus · Accepted Answer

Once a threshold is reached, the opening of sodium gates and the accompanying flow of sodium ions is an example of positive feedback, as the influx of sodium ions further depolarizes the membrane, leading to more sodium gates opening.

Once a Threshold Is Reached