What is Water and why is it so important

What is Water and why is it so important - o Insensible...

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What is Water and why is it so important? Water is the most abundant substance in the body o Average healthy adult is about 60% water Muscle 65% water, fat 10-40% o Can only survive a few days without water o Water balanced among fluid compartments Intracellular fluids: inside cells Extracellular fluids: interstitial fluid between cells and fluid in the blood o Electrolytes: minerals that help maintain fluid balance What is water balance and how do you maintain it? Your thirst mechanism signals dehydration o Dry mouth due to increased electrolyte concentration in the blood: less water available to make saliva o Blood volume decreases, sodium concentration increases in blood Brain triggers thirst mechanism and secretion of antidiuretic hormone (ADH) to reduce urine output Fluid inside cells moves into blood by osmosis. What is Water Balance and how do you maintain it? Water Balance: water consumed = water lost you take in water through beverages and food You lose water through your kidneys, large intestine, lungs, and skin
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Unformatted text preview: o Insensible water loss: through evaporation from skim when you exhale Losing too much water can cause dehydration Dehydration can result from inadequate water intake, too much water loss from diarrhea, vomiting, high fever, or use if diuretics. Cornerstone method : measure body weight before and after high physical activity or labor o Changes in body weight due to loss or gain of body weight Urine color: urine is more concentrated when dehydrated and darker in color Consuming too much water can cause hyponatremia (sodium water too low) How much water do you need and what are the best sources? Daily water needs vary depending on physical activity, environmental factors, and diet Recommendations based on reported total water intake of healthy Americans Men 16 cups/day Women 12/day About 80% from beverages, 20% from foods Physical activity increases needs...
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What is Water and why is it so important - o Insensible...

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