NSD 225 Lecture 3: Water and Minerals
14 Feb 2017
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Document Summary
60% of body weight: 2/3 intracellular, 1/3 extracellular. Water balance water is not stored. Medium for and participant in metabolic reactions. Without food, you could probably survive for 8 weeks; Without water, you could only survive a few days. Water intake is greater than water loss. Sodium in blood is diluted causing hyponatremia. Al: men = 3. 7 liters/day; women = 2. 7 liters/day, men have more muscle mass so they require more. 20 needed by the body in small amounts. Maintain structure and regulate chemical reactions and body processes. Major mineral need > 100 milligrams/day: sodium, potassium, chloride, calcium, phosphorus, magnesium, and sulfur. Trace mineral need < 100 milligrams/day. Iron, copper, zinc, selenium, iodine, chromium, fluoride, manganese, molybdenum, and others. Affected by: amount in soil, processing. Removed (for example, by cooking or removing skins, bran or germ: absorption and bioavailability other minerals, or amount in body. Electrolyte a positively or negatively charged ion that conducts an electrical current in solution.
