What is the main role of the collecting duct in producing a concentrated urine in mammals?

What is the main role of the collecting duct in producing a concentrated urine in mammals?
  1. Reabsorption of essential nutrients
  2. Reabsorption of water
  3. Maintenance of osmolarity gradient
  4. Secretion of hydrogen ions

Solution

The collecting duct allows large amounts of water to be reabsorbed from this region to produce a concentrated urine.

Asked in: NCERT

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