NUT 10 Lecture Notes - Lecture 3: Myoglobin, Kilogram, Collagen

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20 Dec 2016
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Inorganic- do not have c, h, o, n. Purely essential (body cannot make at all!) The path of minerals through the food chain. Mineral profile of soil/ water plants animals. Amount able to be absorbed by the body. Plant sources: spinach, non-heme, iron, less bioavailable than animal sources of heme iron. Exam question: define rda, write 3 factors that change rda. 99% of body"s calcium in teeth and bones. Calcium-phosphorus salt called hydroxyapatite over collagen fibers for bone formation. Calcium deficiency: if not enough dietary calcium in stores as child, inactivity and smoking. Mediates cellular processes like cell division and cell secretions with calcium-binding protein called calmodulin. Vitamin d: carrier for calcium absorption to help boost bioavailbaility. Hormones : tell kidneys to not excrete as much. Hormones: tell osteoclasts to release calcium in bloodstream. Children: poor growth and bone mineralization rickets. Adults: osteoporosis (porous bones, low mineral content)

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