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Unformatted text preview: CHAPTER 8: M I NERALS AND WATER Dr. Olfert's Brief Topic Overview This chapter explores the vast number of roles that water and minerals play in your body. Water is one of the most abundant substances in the human body and one of the most important. Water is part of your blood and the f luid that bathes your cells. I t is a medium in which other substances can dissolve. When dissolved molecules can come in contact with each other, chemical reactions can take place. As part of blood and other f luids, water t ransports nut rients and substances between cells and t issues and helps maintain body temperature. Water acts as a lubricant for joints and eyes, and is part of saliva and mucus in your digestive t ract. I t acts as a protective cushion for the brain and other organs. The amount of water you consume should equal the amount that you lose daily. There can be negative effects when too much or too lit tle water is in your system. If you lose more water than you take in, you can become dehydrated. A dry mouth during early stages of dehydration is due to the increased concentration of electrolytes in your blood. Consuming too much water can cause hyponatremia, too low a level of sodium in the blood. Current f luid recommendations are 9 cups per day for women and 13 cups per day for men. M inerals are inorganic elements that are needed in the body in relatively small amounts. Absorption of minerals from food can vary depending upon their bioavailability. Minerals are categorized into two groups: major minerals and t race minerals. Major minerals are needed in amounts greater than 100 milligrams per day and include sodium, chloride, potassium, calcium, phosphorus, magnesium and sulfur. The t race minerals are needed in amounts less than 20 milligrams and include i ron, zinc, selenium, f luoride, chromium, copper, iodine, manganese, and molybdenum. The functions, daily needs, food sources, deficiency symptoms, and toxicity concerns are explained for each mineral. ...
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This note was uploaded on 05/20/2010 for the course HED 155 taught by Professor Olfert during the Spring '10 term at Grossmont.
- Spring '10