HCO3 is absorbed through?
Correct Answer: PCT
Description: Ans. (a) PCTRef: Ganong 25th ed. / 713* 80-90% of bicarbonate is reabsorbed in PCT.* Absorption of HCO3 is indirect (due to secretion of H+ by PCT)* H+ + HCO3 H2CO3 - H2O + CO2 - CO2 diffuses into epithelial cell and generate HCO3 ion which is then reabsorbed.Also Know* PCT reabsorbs: Na+ Cl, HCO3, PO4, K+,Glucose and amino acid* PCT secrets: H+ ion, organic acid and bases (oxalate, urate)* PCT is highly permeable to water.
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