NUTR 2105 Lecture Notes - Lecture 12: Adrenal Gland, Vasodilation, Angiotensin
10 Apr 2017
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Document Summary
Water constitutes majority of body weight (~60%) More water in muscle than in fat. Females, obese people, and elderly have less water. Aids in regulation of body temp (sweat) Thirst response lags behind the body"s need for water. a symptom of dehydration. Caused by drinking 10-20l within a few hours. Metabolic water (condensation reactions, oxidation of energy-yielding nutrients) Water loses: obligatory water excretion: 500ml(2c) to cary away waste in urine. Enzyme released by kidney cells when blood pressure is too low. Causes kidneys to reabsorb sodium, accompanied by water retention. Aldosterone signals kidneys to excrete potassium and retain sodium. Regulation occurs in gi tract and kidneys causes of imbalance. Imbalance can result in a medical emergency. Solutes lost depend on why uid is lost. Solution of sugar, salt, and water (sports drinks) acid-base balance. Narrow ph range to avoid life-threatening consequences. deviations can denature proteins. Respiration in lungs and excretion in kidneys mineral overview.
