Rods exposed to light will ________.
A) depolarize due to the opening of sodium channels
B) hyperpolarize due to the closing of sodium channels
C) depolarize due to the opening of potassium channels
D) hyperpolarize due to the closing of potassium channels

Question

Quizplus · Accepted Answer

When rods are exposed to light, a special protein called rhodopsin in their outer segments undergoes a conformational change that activates a G protein signaling cascade. This eventually results in the closure of cation channels (including sodium channels) and an increase in the efflux of potassium ions, leading to hyperpolarization of the rod cell membrane.

Rods Exposed to Light Will ________