When sodium ions flow into a neuron and depolarize it, we say the neuron has ________.
A) reached equilibrium
B) been neutralized
C) refracted
D) fired

Question

Quizplus · Accepted Answer

When sodium ions flow into a neuron and depolarize it, it reaches a threshold level and fires an action potential. This is the point at which the neuron becomes activated and begins the process of transmitting an electrical signal down its axon.

When Sodium Ions Flow into a Neuron and Depolarize It