Rhodopsin is the chemical that the rod cells in the eyes use to absorb light. When
a molecule of rhodopsin absorbs light, it splits into a retinal and an opsin molecule,
These molecules later recombine naturally back into rhodopsin at a fixed rate, but
recombination is fairly slow. When you expose your eyes to bright light, all of
the rhodopsin breaks down into retinal and opsin molecules. If you then turn out
the lights and try to see in the dark, you can't. After a few minutes, however, you can see again.why?
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Explanation:
When rhodopsin absorbs light, retinal changes from 11-cis to all-trans retinal. The retinal-scotopsin complex breaks down allowing them to separate. This b reakdown is known as the bleaching of the pigment. The breakdown of rhodopsin triggers a transduction process involving a rapid cascade of intermediates.
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