KIDNEY FUNCTION - water and minerals ADH production is controlled by the HYPOTHALAMUS which senses blood volume(actually blood pressure When blood

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KIDNEY FUNCTION - WATER BALANCE Kidneys serve to filter metabolic waste material from blood plasma. They are well vascularized (good blood flow) and the functional unit which accomplishes this task is the NEPHRON. Filtration of water material, various dissolved minerals and of course water, takes place by OSMOSIS at the level of the GLOMERULUD and BOWMAN'S CAPSULE. Liquid waste, water and various waste materials are accumulated in the portion of the NEPHRON called the LOOP of HENLE (Henle's Loop). - See figures in text for the basic structure of the Nephron, and the manner in which capillaries surround the Loop of Henle. Water re-absorption, along with certain minerals, such as Calcium and Potassium, takes place in the Loop of Henle. The TROPIC Hormone, ADH, produced by the Pituitary (actually the posterior lobe of the pituitary), controls the permeability of the membranes of Henle's Loop to
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Unformatted text preview: water and minerals. ADH production is controlled by the HYPOTHALAMUS, which senses blood volume (actually blood pressure). When blood volume is high, there is no need to conserve water, thus ADH is not active in stimulating the permeability of the LOOP. When blood volume is low (and thus water content in blood plasma), there is a need for water (body fluids), and thus ADH is produced by the by the pituitary. The ADH production, however, is under the control of the HYPOTHALAMUS gland, which sense blood pressures (blood plasma water content). When blood pressure is low, the HYPOTHALAMUS directs the pituitary to produce ADH, which in turn controls (stimulates) water re-absorption in the Loop of Henle. Absorption of minerals, especially calcium is assisted by Aldosterone, a hormone produced by the Adrenal glands (these are associated with the Kidneys)....
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This note was uploaded on 11/08/2011 for the course BIOLOGY BSC1086L taught by Professor Leostouder during the Fall '10 term at Broward College.

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