NFSC 100 Lecture Notes - Lecture 10: Electrolyte, Micronutrient, Osteoporosis
10 Oct 2016
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Document Summary
60% of the entire human body: blood=83, brain=80, lung=80, fat tissue= 10, bone=8% Factors affecting water: gender, age, obesity. Dri: 13 cups (men), 9 cups (women) Individual needs vary: humidity, altitude, activity level and other factors. Major minerals form salts (electrolytes) when dissolved in water. Water crosses the cell membranes freely and follows salts. Body cells control the passing of minerals across membranes to regulate uid balance. Tight control of ph homeostasis: extracellular uid. <6. 8 or >8 death occurs: the body"s minerals are buffers. Integral part of bone and teeth (99%: bone: calcium bank. Biological mediator in body uids (1%: nervous system, blood pressure, blood clotting, muscle contractions, hormone secretion, metabolism. Hormones regulating calcium: vitamin d, pth, calcitonin. Tissues regulating calcium: bone, intestine, kidney. Bone composition: 70% minerals, 22% protein. Healthy bone: adequate calcium and vitamin d can ensure bones reach peak density, osteoporotic bone: Inadequate clciim and vitamin d can cause bone loss and osteoporosis.
