Vitamin A deficiency

Al-fazzani, Marwa Abdulsalam Ali (2018-04-14)

Vitamin A ,called retinel or anti-blindness vitamin active form of vitamin A in body are retinol,retinal and retinoic acid and several provitamin A carotenoids (most notably betacarotene).have many function , in visual cycle ; component of the visual pigments of rod and cone cells, retina ,consists of 11-cis retinal specifically bound to the protein opsin then called rhodopsin is exposed to light, a occur photochemical isomerization the process tirggers a nerve impulse that is transmitted by the optic nerve to the brain ,which release of all –trans retinal and opsin,


In this report I will take about vitamin A deficiency in the children and pregnancy women is called rerinol or anti-blindness vitamin active form is three active forms of vitamin A in the body are retinol, retinal, and retinoic acid. Sources ; in the egg yolk and milk and other vegetables , absorption and transport of vitamin A by the liver and, release from the liver function of vitamin A in the visual cycle ,growth , maintenance of healthy epithelial cells , reproduction , antioxidant activity , the uses to treatment tretinoin , isotrerinoin when have deficiency of vitamin A that will leads to same sings and symptom in eyes and skin

Attribution 3.0 United States
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