Which of the following best describes the firing of a neuron (action potential)?
A) a change in axonal membrane permeability facilitating an inflow of positive ions
B) an electrical current initiated in the cell body which flows the length of the axon
C) the opening of ion channels, promoting a negative charge within the axonal membrane
D) the transmission of neuronal impulses across the synaptic cleft

Question

Quizplus · Accepted Answer

The firing of a neuron, or action potential, involves a change in the axonal membrane's permeability, allowing an inflow of positive ions (mainly sodium ions) into the neuron. This process depolarizes the neuron's membrane, leading to the propagation of the action potential along the axon.

Which of the Following Best Describes the Firing of a Neuron