NUTR 400 Lecture Notes - Lecture 4: Micronutrient, Muscle Contraction, Collagen
Document Summary
Mineral basics: inorganic micronutrients, yield no energy, plant & animal sources, major (greater than or equal to 100mg/day) & trace, retain their chemical identity, cannot be easily destroyed, more stable than vitamins, can be toxic in excess. Calcium: most abundant mineral in the body, functions. Muscle contraction and nerve transmission: 99% found in bones & teeth. Constant state of flux: 1% found in blood. Dietary intake does not effect blood levels. Level maintained at price of bone calcium: calcium needs: Getting more calcium: dairy products= more reliable source, fortified products. Calcium supplements: calcium salts: calcium carbonate, citrate, lactate & phosphate, natural forms: oyster shell, coral calcium, bone meal & dolomite, tips: Body can only absorb approximately 500 mg at a time. Bone basics: dynamic tissue consisting of both: Protein (35%): mostly collagen: cortical bone: dense shell, trabecular bone: hard, spongy network.
