Final Exam FSHN 360 Study Guide Solutions
fat soluble vvitamins - Ans:-structurally similar to sterols or FA
micells, passive diffusion, chylomicrons in circulation
circulatory transporters
no membrane transporter
stored/toxic/don't need daily
toxicity is only really true for Vitamin A and Vi...
retinol activity equivalents (RAE) - Ans:✔✔-a measure of vitamin A activity; the amount of retinol that
the body will derive from a food containing preformed retinol or its precursor, beta-carotene
1 RAE= 1 microgram all-trans retinol or 12 micrograms of beta-carotene
function of vitamin A - Ans:✔✔-visual cycle (retinal), cellular differentiation (RA), whole body growth
(RA), reproductive function (retinol)
visual cycle - Ans:✔✔-a function of Vitamin A
taking retinol and transforming it into 11-cis-retinal in the eye cells, 11-cis-retinal is then combined with
opsin to become rhodopsin which is activated by light to become metarhodopsin
metarhodopsin translates light to the brain via the optic nerve and then opsin is released and becomes
all-trans retinal and the cycle then continues
opsin - Ans:✔✔-protein that combines with 11-cis-retinal in the eye cells to create rhodopsin
vitamin A deficiency - Ans:✔✔-compromised visual cycle
night blindness leading to keratomalacia
stunted growth
infection in GI tract
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