The cell membrane of a retinal photoreceptor contains sodium channels that at rest (in the dark) are normally ________ and have a resting potential that is ________ compared to other neurons.
A) open; hyperpolarized
B) open; depolarized
C) closed; hyperpolarized
D) closed; depolarized
E) inactivated; normal

Question

Quizplus · Accepted Answer

In the dark, sodium channels in retinal photoreceptors are open, allowing sodium ions to flow into the cell, which keeps the cell depolarized compared to other neurons.

The Cell Membrane of a Retinal Photoreceptor Contains Sodium Channels