NTR 306 Chapter Notes - Chapter 12: Kidney Stone Disease, Fluid Balance, Bioavailability
Document Summary
Present in all body tissues and fluids: necessary for most physicochemical processes that take place in the body. Two groups: major/macro minerals, trace/micro minerals. Body maintains tight control over mineral balance: gi tract. Regulates absorption from food based on the body"s need. Minerals are excreted in the feces or reabsorbed through the large intestine: kidneys. Excretes excess and reabsorbs the minerals when the body needs them. Aids in muscle contraction & nerve impulse conduction. Is absorbed in the small intestine: kidneys maintain balance by excreting excess. Functions: help lower high blood pressure. Causes kidneys to excrete excess sodium: helps buffer blood (maintaining ph in blood, preserve calcium and phosphorus in the bones. Daily needs: ai for all adults is 4700 mg/day, most americans fall short. Or too little: hyperkalemia too much potassium in the blood, hypokalemia too little blood potassium. Increased risk of hypertension, kidney stones and loss of bone mass with moderately low intake.
