KINESIOL 1F03 Lecture Notes - Lecture 10: Amenorrhoea, Immune System, Magnesium
18 Apr 2016
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Document Summary
55% mineral crystals: provides strength and structural support. Very dense: part of outer walls of larger bones, main tissue of small bones. Genetically programed to grow in length: ceases at 14 years (girls), 17 years (boys) Bone mineral density is the result of bone remodelling: breaking down bone tissues by osteoclasts, rebuilding them by osteoblasts. Osteoclast > osteoblast activity as we age. Calcium is the most abundant mineral in the body: 99% is found in bone, 1% in body fluid. Forms hydroxyapatite: a matrix on collage, provides strength. Contributes to blood pressure and binds to proteins: these proteins regulate muscle contraction. Plays a role in hypertension and weight management. Involves vitamin d and 2 hormones: calcitonin is for rising blood calcium, parathyroid hormone (pth) is for falling blood calcium. Vitamin d acts as a hormone: helps to maintain blood calcium level. Calcium adequacy: adults 30, pregnant women 50, children 50-60% Calcium absorption enhancers: acid, vitamin d.
