Which of the following factors has a direct action to control sodium channel gating in rods of the retina?
A)Acetylcholine
B)Cyclic adenosine monophosphate
C)Cyclic guanosine monophosphate
D)Norepinephrine
E)Transducin

Question

Quizplus · Accepted Answer

Cyclic guanosine monophosphate (cGMP) directly binds to and controls the opening and closing of sodium channels in the rods of the retina. When light is detected by the photoreceptor cells, this leads to a decrease in cGMP concentration, which causes the sodium channels to close, leading to hyperpolarization of the cell and ultimately, the generation of a neural signal.

Which of the Following Factors Has a Direct Action to Control