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Quiz2StudyGuide

Quiz2StudyGuide - Renal water reabsorption Proximal Tubule...

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Renal water reabsorption:  Proximal Tubule – 70% Loop of Henle – 15 % Distal Tubule – 5 % Collecting Duct – ADH, Aldosterone responsive – 15 % pH Balancing: CO2+H2O  H2CO3 (Carbonic Anhydrase)  H + HCO3 HCO3 is the most important extracellular buffer in the body Prox, Dist, and Duct all actively secrete and add  Phosphate is a urinary buffer :  H +   HPO 4 2-   H 2 PO 4 - By picking up H+ ions, it manages acidity | releasing them (bicarbonate) –basicity Na regulation:  Na = 90% of osmotically active particles Aldosterone  increases Na and Cl reabsorption and K loss – in dist Angiotensin  II increases Na and HCO3 reabsorption  -in prox Respiratory Acidosis  = decrease in ventilation = increase in CO2 in blood   pH<7.4 P>40 mmHg Renal correction: increase in CO2 = increase in H+ with pH balancing SO, to correct,  raise HCO3 by removing CO2
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