The First Step in the Visual Transduction Process That Occurs

Question

The first step in the visual transduction process that occurs in the retina is
A)activation of amacrine cells.
B)absorption of scattered light by the pigmented epithelium.
C)interruption of the dark current.
D)absorption of light by photopigments.
E)generation of action potentials in the optic nerve.

Accepted Answer

The first step in the visual transduction process that occurs in the retina is the absorption of light by photopigments. This leads to a series of molecular events that ultimately result in changes in the membrane potential of photoreceptor cells, interrupting the dark current and ultimately leading to the transmission of visual signals to the brain.