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Water

Water. Inorganic Not energy-yielding Essential. Objectives. After reading Chapter 7 and class discussion, you will be able to: Define terms associated with water and body fluids Describe the fluid composition of the body Describe water balance. Objectives.

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Water

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  1. Water • Inorganic • Not energy-yielding • Essential

  2. Objectives • After reading Chapter 7 and class discussion, you will be able to: • Define terms associated with water and body fluids • Describe the fluid composition of the body • Describe water balance

  3. Objectives • Identify sources of water and % of water in selected foods • Discuss symptoms of dehydration • Apply oral rehydration therapy (ORT) • Describe functions of water

  4. Functions of Water • Transport • Solvent • Lubricant • Maintain blood volume • Body temperature regulation • Structural support for molecules • Participate in metabolic reactions

  5. Functions of Water • Transport • Carries nutrients to the cells and carries away waste materials to the kidneys and out of the body in urine

  6. Functions of Water • Solvent • Keeps the following in solution so they can participate in metabolic activities: • Minerals • Vitamins • Glucose • Many other small molecules in the body

  7. Functions of Water • Lubricant • Acts as a lubricant or cushion around joints; in the eye, the spinal cord • In pregnancy cushions the amniotic sac surrounding the fetus

  8. Functions of Water • Maintains blood volume • Body temperature regulation • evaporation of sweat from the skim removes excess heat from the body

  9. Functions of Water • Structural support • Maintains the structure of large molecules such as protein and glycogen • Metabolic reactions • Water participates in every step of the process of converting food to energy and tissue

  10. Body Composition 60%

  11. Water in the Body • Nutrient composition of the body • Water = 60% • Fat = 13-31% • Male = 13 -21% • Female = 23 -31% • Carbohydrate, Protein, Vitamins, Minerals, Other = 9 – 27%

  12. Water in the Body • Example: 150# body • Water = 90# • Fat = 20 -45# • Carbohydrate, Protein, Major Minerals = 15 -40# • Vitamin, Minor Minerals = < 1#

  13. Water In The Body • Adult body composition is 60% water; higher in children • Water is ¾ of weight of lean tissue • Water is ¼ of weight of fat tissue • Proportion of water smaller in women, obese, and elderly

  14. Body Fluids • Intracellular • Extracellular • Interstitial • Intravascular

  15. Water In = Water Out

  16. Water Balance • Water losses • Obligatory losses=500cc/day (2 c.) • Needed to dispose of body wastes • Insensible losses – lungs, skin • Water sources • Food sources (700-1000 cc) • Liquid sources • Water vs. Liquids

  17. Fluid:Nutrient Comparison

  18. How Much Water is Enough?

  19. Recommended Water Intake • 1 cc/kcal (30-35 cc/kg) • 6-10 cups per day • Adequate Intake (AI): • Men=3.7 L/day (about 14 c/day) • Women=2.7 L/day (about 10 c/day)

  20. Water Balance • Dehydration • See Signs of Dehydration • Treat with Oral Rehydration Therapy • Water Intoxication • Hyponatremia • Athletes • Elderly

  21. Fluid And Electrolyte Imbalance • Replacing lost fluids/electrolytes • Oral rehydration therapy (ORT) • ½ L. boiling water • 4 t. sugar • ½ t. salt

  22. Coffee vs. Water • What about coffee/caffeine? • No significant difference in hydration • Caffeine naivety Journal of American College of Nutrition 2000, 2003

  23. For Caffeine Users Drink Caffeine: Do Stupid Things Faster with More Energy

  24. Objectives • After reading Chapter 7 and class discussion, you will be able to: • Define terms associated with water and body fluids • Describe the fluid composition of the body • Describe water balance • Identify sources of water and % of water in selected foods

  25. Objectives • Discuss symptoms of dehydration • Apply oral rehydration therapy (ORT) • Describe functions of water

  26. ED-U-KINETICS

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