Chapter 8_Minerals

Chapter 8_Minerals - Chapter8Minerals&Water HPEB502...

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HPEB 502 Fall 2011
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What Is Water and Why Is It So  Important? Water is the most abundant substance in body. Average healthy adult is about _____% water Muscle: ____% water Fat: _____% water Can only survive _________ without water
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Electrolytes Water balanced among fluid compartments Intracellular fluids:  inside cells Extracellular fluids:  interstitial fluid between cells  and fluid in the blood Electrolytes:  minerals that help maintain fluid  balance
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Functions of Water 1. Acts as universal ____ __  and a transport  _______ Medium for many chemical reactions in body As part of blood, helps transport oxygen, nutrients,  hormones to cells As part of interstitial fluid, helps transport waste  products away from cells for excretion 2. Helps maintain __________________ 3. Is a ____________ for joints, eyes and is part of  mucus and saliva  4.  Is a _________________ for brain, organs, fetus
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What Is Water Balance and  How Do You Maintain It? Water balance: You take in water through _____________________. You lose water through your kidneys (as ____________),  large intestine, lungs, and skin (as _________________). Insensible water loss:  through evaporation from skin  and when you exhale Losing too much water can cause  _____________ Can result from inadequate water intake or too much water  loss from diarrhea, vomiting, high fever, or use of diuretics.
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More on Dehydration Other ways to tell if you are dehydrated: 1. Cornerstone method:  measure body weight  before and after high physical activity or labor Changes in body weight due to loss or gain of  body water 2. Urine color:  urine is more _____________ when  dehydrated and ________ in color  (see text figure 8.6) Consuming too much water can cause  hyponatremia   (sodium blood level too low). . During endurance athletic events or strenuous military  training  . Can happen in infants
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How Much Water Do You Need and  What Are the Best Sources? Daily water needs vary depending on:    Recommendations based on reported total water  intake of healthy Americans About _____% from beverages, _____% from  foods Water content of foods Figure 8.7 in our text Figure 8.8 has tips Physical activity increases needs!
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Types of Bottled Water Mineral water Spring water Sparkling water Distilled water Flavored water Vitamin or enhanced water
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Drinking Water Safety Municipal water quality is monitored by local water  utilities and is regulated by the Environmental  Protection Agency (EPA) http://water.epa.gov/drink/index.cfm 
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Chapter 8_Minerals - Chapter8Minerals&Water HPEB502...

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