Confusion: Rod cells,rhodopsin bleaching

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ADAS137
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Confusion: Rod cells,rhodopsin bleaching

Post by ADAS137 » Sun Jan 01, 2012 10:26 pm

I'm confused as to why,when exposed to bright light, rod cells cease to function.

I understand that exposure to bright light bleaches all of the rhodopsin, but...so what?

Why doesn't the bleached product (opsonin/retinal) simply get re-synthesised back into rhodopsin as it does in dim light, and therefore continue the cycle and enable impulses?

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