Peak bone mass occurs during teenage years and

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Chemistry for Today: General, Organic, and Biochemistry
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Chapter 1 / Exercise 1.86
Chemistry for Today: General, Organic, and Biochemistry
Seager/Slabaugh
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Peak bone mass occurs during teenage years and decreases in old age Peak bone mass: highest attainable bone density, occurs in first 3 decades of life Recommendations also vary with Ca content of your diet as there are Ca pinders in foods ex) oxalates (green veggies) and phytates (some grains) bind Ca Calcium Sources 1. Milk most significant source of Ca and vit D ** can also get this in anternatives 2. Vegetables rutabaga, broccoli, greens (beet, turnip, mustard), bok choy, kale 3. Small fish with bonesincludes stock from bones ex) sardines 4. Almonds 5. Ca-fortified foodstofu, canned tomatoes, stone-ground flour, blackstrap molasses, fortified OJ 6. High Ca milk/soy milk 7. Ca supplements NOTE: sprinkle a Tbsp or two of fat-free dry milk into any food to give you this Balance blood calcium is regulated by calcitonin and parathyroid hormone find more resources at oneclass.comfind more resources at oneclass.com
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Chemistry for Today: General, Organic, and Biochemistry
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Chapter 1 / Exercise 1.86
Chemistry for Today: General, Organic, and Biochemistry
Seager/Slabaugh
Expert Verified
Calcitonin: this is made by the thyroid gland. When calcium concentration in the blood rises too high, calcitonin acts to stop withdrawal of Calcium from bone or to slow absorption from intestine Parathyroid hormone: produced by the parathyroid gland and acts as an opposite to calcitonin Excess 1. Kidney stones collection of Ca in the kidneys ** other factors are involved like excess oxalates, phosphates, dehydration 2. Interference with other mineral absorption 3. Constipation Deficiency 1. Osteoporosis adult bone loss leading to brittle and fragile bones. ** major health problem among many older adults 2. Increased need met by increased absorption of Ca from intestine and prevents its loss from kidneys Health Claims DzA healthy diet with adequate calcium and vitamin D and regular PA help to achieve strong bones and may reduce risk of osteoporosisdzDz(elps to prevent bone reabsorption and osteoporosisdzBone Growth Goals Grow strong bones? Ages 2-12yrs drink milk, be active, limit screen time and drink fluoridated water Achieve peak bone mass? Ages 13030yrs drink milk, physical activity, no smoking/drinking, fluoridated water Maximize bone retention? Ages 31-50yrs recommend bone strengthening exercise and calcium supplements for most Minimize bone loss? Ages 51+yrs positive bone density test, bone restoring meds and supplements Phosphorus 2nd most abundant mineral in the body, about 85% combined with Ca in the crystals of bone and teeth Functions ͳ. Part of cell’s genetic material ȋDNA, RNAȌ essential for growth and renewal of cells 2. Principal component of cell membranes big part of phospholipids 3. Assists in energy transfer caries, stores and releases energy 4. Assists many enzymes and vitamins in extracting energy from nutrients 5. Critical role in buffering systems maintains acid-base balance of cellular fluids Recommendations RDA = 700mg/day (males and females) UL = 4000mg/day DeficiencyAlmost unknown, if it occurs where is bone pain and muscle weakness Excess May cause Ca excretion and calcification of kidneys Food Sources 1. Animal protein find more resources at oneclass.comfind more resources at oneclass.com

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