NFS 4271 Study Guide - Quiz Guide: Caffeine, Fibrin, Muscle Contraction
17 Sep 2017
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1150 g in a 60 kg person. Dairy (yogurt, part-skim 415 mg, ricotta, 1/2 cup 337 mg) Plain, fat-free yogurt has more calcium than greek fat-free yogurt. Vitamin d in milk doesn"t aid in calcium absorption because it is not in the activated form. Seafood with bones (sardines 3 oz 372 mg) Most asian cultures don"t consume much dairy, and get their calcium from vegetables. Spinach is a good source (200 mg per cup cooked), but oxalic acid prevents absorption. Most juices are fortified (apple, grape, and orange, etc) Utilize calcium supplements without potential for contamination. Same recommendations for pregnant and lactating women. Rapidly absorbed in duodenum with acidic medium. Slower but more is absorbed from lower small intestine. (less hcl) Must be in ionic form if bound to other substances, is not absorbed. (i. e. spinach) Transient receptor potential vanilloid trpv6 (on brush border membrane) More active with lower calcium intake (100 mg vs 500 mg supplement)
