Part C - How Light Bleaches Rhodopsin For this exercise, you will take a scenari
ID: 220637 • Letter: P
Question
Part C - How Light Bleaches Rhodopsin
For this exercise, you will take a scenario of bleaching occurring within the rod cells and rank the steps in the process from beginning to end.
Rank the order of the bleaching process from beginning to end.
1-Vitamin A from
the bloodstream
replenishes what
is lost. The vitamin A
returns to its original
shape and gets
reincorporated into
rhodopsin.
2- Rhodopsin absorbs
light, and the
vitamin A changes
shape.
3- Vitamin A detaches
from the rhodopsin,
and some vitamin A
is lost.
4- Light travels to the
macula within the
retina.
5- Light enters the eye
through the cornea.
Light contacts the eye.--------------- Light-absorbing capabilities of proteins are regenerated
Explanation / Answer
1. Light enters the eye
through the cornea.
Light contacts the eye.
2. Light travels to the macula within the retina.
3.Rhodopsin absorbs light, and the vitamin A changes shape.
4.Vitamin A detaches from the rhodopsin, and some vitamin A is lost.
5.Vitamin A from the bloodstream replenishes what is lost. The vitamin A returns to its original shape and gets
reincorporated into rhodopsin.