AVS 101 Lecture Notes - Lecture 6: Osteogenesis Imperfecta, Calcification, Xerophthalmia
20 Sep 2016
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Avs - 101 - lecture 6 - vitamins - anthony mallilo. Only need about 95 milligrams of vitamin c daily. Vitamin c needed by human, manufactured in a dog. Xerophthalmia- pink area around rat"s eye becomes crusty/scab > blindness. Hypervitaminosis = excess intake of a vitamin. In animals is due to feed error. Can cause anorexia, cessation of menstrual cycle, and skin discoloration in humans. From plants: produce beta carotene = precursor. Calcium absorption- enhances absorption of ca/p from intestine. Rickets- only in mammals and birds, poor bone formation. Rare in animals, common in postmenopausal women. Estrogen therapy (has negative side risk of certain cancers) Mobilizes ca/p from boney tissue to soft tissue. Walls of blood vessels, kidney tubules, bronchi & heart. Fortified products > milk, cod liver oil, tuna, eggs. Body stores vitamin d & a in the liver. 7 dehydrocholesterol- animal sterol stored beneath skin. Uv light (sun) + sterol = d3.
