The level a neural impulse must exceed to cause a neuron to fire is called the ________.
A) threshold of excitation
B) kinetic potential
C) kinetic ceiling
D) polarization limit

Question

Quizplus · Accepted Answer

The threshold of excitation is the minimum level of stimulation required for a neuron to generate an action potential, or to “fire”. It is the point at which the neuron’s membrane potential reaches a certain level of depolarization that triggers the opening of voltage-gated ion channels, leading to the rapid influx of positively charged ions (such as sodium) and the generation of an electrical impulse. Choices B, C, and D are not accurate terms for describing the firing threshold of neurons.

The Level a Neural Impulse Must Exceed to Cause a Neuron