Which of the following describes an event in the visual response process?
A)Light energy strikes the retina and excites pigments to release retinal.
B)Light energy strikes the cornea and excites pigments to release retinoic acid.
C)Visual pigments deep in the brain are excited by light transmitted through the retina.
D)Epithelial cells on the surface of the eye respond to light energy by transmitting opsin molecules along nerve pathways to the brain.
E)Retinal in the visual cortex responds to electrical signals from the retina.

Question

Quizplus · Accepted Answer

When light energy strikes the retina, it excites the pigments (specifically, the opsin portion of the pigment) which triggers a biochemical cascade ultimately resulting in the release of retinal from the pigment molecule. This release of retinal is a crucial step in the visual response process as it initiates the generation of an electrical signal that can be transmitted to the brain for visual processing.

Which of the Following Describes an Event in the Visual