When light strikes photoreceptors

Question

Quizplus · Accepted Answer

When light strikes photoreceptors, the chromophore retinal undergoes a change of shape, which triggers a signal transduction cascade and ultimately leads to a decrease in neurotransmitter release from the photoreceptors. This results in the photoreceptors becoming depolarized, which generates an electrical signal that can be transmitted to other cells in the visual pathway. Therefore, both options A and B are correct. Option E is incorrect because option C is not true - the photoreceptors become hyperpolarized, not depolarized, when they receive light.

When Light Strikes Photoreceptors