<prompt> Maximum absorption of HCO3- occurs in:PCTDCTcollecting ductascending limb of the loop of Henle  <response>: Bicarbonate: 80 of bicarbonate reabsorption occurs in the PCT, 10 in thick ascending limb of LOH, and remaining in the DCT and collecting duct. Filtered bicarbonate can be reabsorbed only when it combines with H. 