On a dark night, the rods have a high concentration of

Question

Quizplus · Accepted Answer

The correct answer is C because the rods contain a high concentration of cGMP, which is required for the activation of the rod cells in low light conditions. cGMP binds to and opens Na+ channels in the outer segment of rod cells, which allows for the influx of Na+ ions and depolarization of the cell, leading to the generation of electrical signals that are transmitted to the brain. In brighter light conditions, the concentration of cGMP decreases, causing the Na+ channels to close and hyperpolarizing the cell, leading to reduced signal transmission to the brain.

On a Dark Night, the Rods Have a High Concentration