Question

question 1
3 tries left
the ________ is the level an impulse must exceed to cause a neuron to fire.
action potential
threshold of potential
graded potential
threshold of excitation

Explanation:

The threshold of excitation is the minimum level an impulse must reach to trigger a neuron to fire. Action potential is the electrical signal generated when a neuron fires. Threshold of potential is not a standard term in this context. Graded potential is a small - scale change in membrane potential that may or may not lead to firing.

Answer:

D. threshold of excitation