Water%20_%20Electrolytes_10-26-11 - Water &...

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CHAPTERS 10 Water & Electrolytes Nastaran Faghihnia, PhD
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Outline Body Water: Distribution & Functions Water Balance Water Needs Electrolytes: Sodium, Potassium and Chloride in the Diet & in the Body
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Fluid Facts Body fluids comprised of Water Dissolved substances (solutes) Minerals: sodium, potassium, chloride 50-70% of body weight is water 90% of blood is water 75% of muscle is water 25% of bone is water 10% of fat is water
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Where Is The Fluid Located? 2/3 fluid is intracellular 1/3 extracellular Extracellular fluid is Interstitial- between cells or Intravascular- inside blood vessels & lymph intracellular fluid cells burst intracellular fluid cells collapse
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Functions of Body Water The most important nutrient on a daily basis Functions: 1. Dissolves solutes 2. Transports water-soluble substances 3. Blood volume & blood pressure 4. Lubricant and protection 5. Regulates body temperature 6. Chemical reactions
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Hydrolysis and Condensation Reactions
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Water Balance: Ins and Outs •Metabolic water: water from the byproduct of metabolic reactions (condensation reactions!)
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External Factors That Influence Water Balance Illness: fever, cough, vomit, diarrhea Injury with blood loss exercise Variations in temperature, humidity and altitude (breathe faster) Pregnancy & breastfeeding Diuretics - alcohol, medications, caffeine (less so) High fiber, protein & sodium diet
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Regulation of Body Water body water = blood solutes & blood volume & blood pressure
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Water%20_%20Electrolytes_10-26-11 - Water &...

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