fluid and electrolyte balance

fluid and electrolyte balance - Chapter 20: Fluid and...

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Chapter 20: Fluid and Electrolyte Balance: Fluid/Electrolyte Homeostasis: Over the course of a day we ingest about 2 L of fluid that contain 6-15 g of NaCl. We also take in varying about of K, H, Ca, bicarbonate, and phosphate ions. The kidneys are the primary route for water loss and for removal of many ions. Although physiological mechanisms that maintain fluid and electrolyte balance are important, behavioral mechanisms also play an essential role. Drinking is the only normal way to replace lost water. Salt appetite is a behavior that leads people and animals to seek and ingest salt. Water and Na are associated with ECF volume and osmolarity. K balance helps with cardiac and muscle functioning by working with membrane potential of excitable cells. Ca is involved in exocytosis and muscle contraction and bone formation and blood clotting. Ecf Osmolarity affects cell volume: If the osmolarity of the ECF fluid changes, water moves into or out of cells and changes intracellular volume. If ECF osmolarity decreases as a result of excess water intake, water moves into cells and they swell. If ECF osmolarity increases as a
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This note was uploaded on 02/14/2012 for the course BIO 89515 taught by Professor Janmachart during the Fall '09 term at University of Texas at Austin.

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fluid and electrolyte balance - Chapter 20: Fluid and...

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