HLTH 220 Lecture Notes - Lecture 13: Adipose Tissue, Extracellular Fluid, Water Balance
6 Dec 2016
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Document Summary
Water is the most abundant substance in the body. The average healthy adult is 45-75% water. Depends on age, composition (muscle tissue ~75%/ adipose tissue <20%) We can survive only a few days without water. Polarity attracts charged particles into a solution that dissolves proteins, glucose, and some minerals. Water is important for metabolic reactions and acid-base balance. During digestion, water hydrolyzes the bones of carbohydrate, protein and fat molecules. Water is formed and released when smaller molecules join together. Water has protective and structural roles in the body during condensation. Lubricant for joints, sensitive eye tissues, mouth, and intestinal tract. Electrolytes are minerals with charged ions that conduct electrical current. Ids in electrical conduction in nerve and muscle cells. Albumin in the vascular space attracts fluid from the interstitial spaces. Daily water needs depend on physical activity, environmental factors, and diet. Current recommendations are based on reported total water intake of generally healthy americans with adequate hydration.
