ANSC 1111 Lecture Notes - Lecture 12: Model Organism, Homeostasis, Hair Loss
Document Summary
Not synthesized by the animal in sufficient amount. Animal model (monkeys and guinea pigs require vitamin c) Beta-carotene yellow, orange plant or animal. Cats cannot just eat plants because they can"t turn beta-carotene into vitamin a. Absorption: si micelles (lipids bc vitamin a is fat soluble) Eyes component of rods/cones of retina. Golden guernsey milk - more yellow in color, no nutritional difference. Vitamin d is a vitamin and a hormone. Converts sterols to active form in plants and animals. Absorption: si micelles (lipids - bc vitamin d is fat soluble) Kidney: d2, d3 converted to 1,25-dihydroxycholecalciferol = hormone. Ca/p homeostasis intestinal absorption, release from bone, kidney excretion. Calcinosis - toxicity - bone formation in soft tissue (where you don"t want it to be) White muscle disease (deficiency of se, too) Diets high in pufa increase vite requirement. Hypervitaminosis one of least toxic vitamins. Liver synthesis of prothrombin, formation of a clot.
