Question

what is the first step necessary for initiating the visual transduction cascade in rods? select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a photoreceptor cell hyperpolarization b activation of transducin c activation of phosphodiesterase d capture of a photon by rhodopsin and isomerization of retinal

Answer 1

The first step necessary for initiating the visual transduction cascade in rods is option d capture of a photon by rhodopsin and isomerization of retinal.

What is the visual transduction cascade in rods?

When light strikes a retinal molecule in rhodopsin, it causes the molecule to change shape, a process called isomerization. This change in shape triggers a cascade of events that leads to the hyperpolarization of the photoreceptor cell.

So, Hyperpolarization is a decrease in the electrical potential across the cell membrane, which signals to other neurons in the retina that light is present. Rhodopsin is a protein that is found in the outer segments of rod photoreceptor cells in the retina.