<prompt> Collecting duct has which cells -Principle and intercalatedParietal and oxynticLac is cellsPodocytes  <response>: Ans. is a i.e.. Principle and intercalatedo Collecting duct is 20 mm long and pass through the renal cortex and medulla to empty- into the pelvis of the kidney at the apex of the medullary pyramids. The epithelium of the collecting ducts is made up of two types of cell: -Principal cells P cells, which are involved in Na reabsorption and ADH stimulated water reabsorption.Intercalated cells I cells which are concerned with acid H secretion and HCO3 transport. 