The resting neuron
A)is polarized.
B)has an internal (+) charge.
C)has an internal negativity because of the outward leak of Na+.
D)has an internal negativity because of the inward leak of K+.

Question

Quizplus · Accepted Answer

The resting neuron is polarized, meaning there is a difference in electrical charge between the inside and outside of the neuron. This polarization is maintained by the uneven distribution of ions across the neuron's cell membrane. At rest, there is a surplus of negatively charged proteins and organic ions inside the neuron, giving the inside a negative charge relative to the outside. Therefore, option A is correct. Options B, C, and D are incorrect because the resting neuron does not have a net positive internal charge and is not leaking significant amounts of either sodium or potassium ions in either direction.

The Resting Neuron