What is the role of collecting duct in selective reabsorption?

cbse
excretory-products

#1

The cuboidal epithelial cells of collecting tubule are permeable to water but not to salt. This allows the reabsorption of large amounts of water which results in the formation of concentrated urine.
(b) It also plays a role in the maintenance of pH and ionic balance of blood by the selective secretion of H+ and K+ ions.