unit 4 ch11 water and major minerals

Unit 4 ch11 water - Chapter 11 Water and the Major(Macro Minerals Water Comprises 50-70 of the body Lean muscle tissue contains ~73 water Fat

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Chapter 11: Water and the Major (Macro) Minerals
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Water Comprises 50-70% of the body Lean muscle tissue contains ~73% water Fat contains ~20% water Intracellular fluid Fluid within the cell Extracellular fluid ( Outside of the cell ) Interstitial (fluid between the cells) Intravascular (fluid within the blood stream and lymph )
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Functions of Water Metabolic processes Solvent Body temperature regulation Water absorbs any excess heat Body secretes fluids via perspiration Skin is cool as perspiration evaporates Removal of body waste Via urine Urea excretion Avoid concentrated urine Amniotic fluid, joint lubricants, saliva, bile
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Electrolyte Substances that break down into ions in water and, in turn, are able to conduct an electrical current. Sodium, chloride and potassium are the body’s major electrolytes. Sodium (Na + ) and Cl - are the main extracellular (outside cells) ions. Potassium is the major intracellular (inside cells) ion.
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Water balance is maintained between cellular compartments by controlling the movement of ions in and out of cellular compartments. Water follows electrolytes across cell membranes. Osmosis – The passage of a solvent (water) through a semi-permeable membrane from a less concentrated compartment to a more concentrated compartment.
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Two hormones involved in water and electrolyte balance Antidiuretic hormone (ADH) – A hormone that is secreted by the pituitary gland and acts on the kidneys to cause a decrease in water excretion. Aldosterone – A hormone produced in the adrenal gland that acts on the kidneys, causing them to retain water.
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Recommend 1 ml per 1kcal Are You Drinking Enough Water? Water balance - Intake V s Output
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Minerals Inorganic substances Needed in tiny amounts Not destroyed in cooking Yields no energy
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General Functions Of Minerals Cofactors (examples – copper and selenium) Components of body compounds (example - iron in hemoglobin in red blood cells) Transmission of nerve impulses (examples -sodium, potassium, calcium) Body growth and development (examples -calcium and phosphorus) Water and electrolyte balance (examples – sodium, chloride, potassium)
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Absorption Negative - Competition between mineral (zinc and cooper) - Non-mineral substances in the diet - Phytic acid (phytates) of wheat grain fiber - Qxalic acid found in plants such as spinach Positive - Vitamin C increases iron absorption - Vitamin D increases calcium, phosphorus and magnesium absorption Transport travel in blood free or bond to protein Excretion primarily via the urine
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Minerals are divided into two groups Based on dietary need Major Daily need 100
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This note was uploaded on 06/15/2008 for the course HUN 1201 taught by Professor Razsaadat during the Fall '08 term at FSU.

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Unit 4 ch11 water - Chapter 11 Water and the Major(Macro Minerals Water Comprises 50-70 of the body Lean muscle tissue contains ~73 water Fat

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