α - intercalated cells are present in _________ helps in __________: (A) Distal convoluted tubule, HCO3– secretion, (B) Distal convoluted tubule, H+ secretion, (C) Collecting duct, H+ secretion, (D) Collecting duct, HCO3– secretion
Answer is C. Intercalated cells are present in Collecting duct
I cells are of 2 types.

Alpha : acid secretion
Beta : HCO3 secretion