Site of maximum bicarbonate absorption-
Correct Answer: Proximal convoluted tubule
Description: Ans. is 'a' i.e., Proximal convoluted tubule o About 80-90 of filtered HCO3- is absorbed in PCT.o Absorption of HCO3- is indirect, which is due to secretion H+, i.e., secretion of H+ is coupled with absorption of HCO3o Filtered HCO3- reacts with H+ to form H2CO3 which then is dissociated into H2O and CO2.o CO2 diffuses into epithelial cell and generate HCO3- which is then reabsorbed.
Category:
Physiology
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