Structure Function Glomerulus PCA Descending limb of loop of henle Ascending limb of loop of henle DCT Collecting duct Isotonic ultrafiltration Reabsorption of Na+ H2O, amino acids, HCO3,K+, Ca2+, Cl- Reabsorbs H2O into interstitium, impermeable to solute. Impermeable to H2O,loop diuretics acts here. Resorption of Na, K, Cl, k/a the diluting segment. Thiazide diuretics act here, removes 10% of Na+& Cl-, some H2O also removed. Aka concentrating segment, absorbs 10 - 12% of H2O under ADH, principle cells reabsorbs Na+& secretes K+ , intercalated cells reabsorbs K+ & secretes HCO-3.
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