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7 Cards in this Set
- Front
- Back
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proximal convoluted tubule |
-majority of salt is reabsorbed -also solutes and water -isotonic to interstitium (conn. tissue surrounding nephron) -secretion for waste products; hydrogen, potassium, ammonia, urea |
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descending limb |
-permeable only to water -as goes deeper into medulla (more osmolarity), water flows out more, reabsorbed into vasa recta |
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countercurrent multiplier system |
-filtrate in loop of Henle flows opposite direction as blood in vasa recta -if flowed in same direction, would reach equilibrium, kidney would be unable to resorb as much water -filtrate constantly exposed to hypertonic blood--> maximal reabsorption of water |
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ascending loop of Henle |
-only permeable to salts, not water -salt concentration decrease as ascending limb rises -salts removed from filtrate as travels up this loop |
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diluting segment |
-only portion of nephron that produces urine more dilute than blood -only active transport, resorption of sodium and chloride -large mitochondria, thicker |
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distal convoluted tubule (DCT) |
-responds to aldosterone -sodium out, water follows -waste secretion |
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collecting duct |
-final concentration of urine depends on permeability -responds to ADH and aldosterone |
