Which of the Following is Not True About the Resting

Question

Which of the following is not true about the resting state of rods?
A) It is during darkness.
B) Retinal is in 11-cis form.
C) Gated sodium channels are open.
D) Bleaching occurs.
E) Membrane potential is around -40mV.

Accepted Answer

Bleaching of photopigments occurs when they are exposed to light, not in the resting state of rods which is in darkness. In the resting state, the photopigment (rhodopsin in rods) is intact with retinal in the 11-cis form, and no bleaching occurs.