nutrition chapter 11

nutrition chapter 11 - WATER 50-70% of adult body (>10...

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WATER 50-70% of adult body (>10 gallons) -in cells -between cells -in vessels blood volume ~ 80% water lean tissue ~ 73% water adipose tissue ~ 20% water ~6% of body water replaced daily Humans can survive only a few days without water. FUNCTIONS OF WATER Structural component of all cells Basis for most body fluids Solvent Control of pH Transport medium: Nutrients and blood cells to tissues Waste products from tissues Biochemical reactions (ex. hydrolysis, catalyst) Temperature regulation WATER BALANCE INPUT = OUTPUT (No storage depot for water in body) INPUT Beverages Foods Metabolic products Examples of water in foods: lettuce ~ 95% green beans ~ 89% milk ~ 87% meat ~ 50% bread ~ 33% OUTPUT Urine Respiration Skin evaporation Sweat Feces
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WATER OUTPUT REGULATION Obligatory urine volume: Minimum amount of water kidneys must excrete daily to remove wastes and solutes from body.
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This note was uploaded on 05/14/2008 for the course NFS 207 taught by Professor Handley during the Spring '08 term at Rhode Island.

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nutrition chapter 11 - WATER 50-70% of adult body (>10...

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