NTR 401 Study Guide - Midterm Guide: Chronic Kidney Disease, Hyperkalemia, Amniotic Fluid
15 May 2016
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Water and the major (macro) minerals: water. Water absorbs any excess heat body secretes fluids via perspiration skin is cool as perspiration evaporates. Removal of body waste via urine urea excretion. Too much water without sufficient electrolytes intake water toxicity. Sweating losing electrolytes (na+, k+, dilute them in the body) Usually not a problem (people won"t drink that much) endurance events. Table salt (nacl): 40% sodium, 60% chloride: absorption and excretion of sodium. Absorbed from the stomach, small intestine and colon. Excretion regulated by the kidneys: functions of sodium, positive ion in extracellular fluid, key for retaining body water, muscle contraction, conduction of nerve impulses, food sources of sodium (dr) 1/3 - of intake is added to food by individual. 2/3 is added by food manufacturers. Sodium content listed on the labels: sodium needs. Typical intake is 4000-7000 mg/day: recommendations, nacl intake: < 2300 mg/day, adults age 51 or older.
