Question

Which of the following components help to
maintain the osmolarity gradient in medulla of
the kidney?
1) Urea and ammonia
2) K+ and H+
3) H+ and NH3
4) NaCl and urea

Answer 1

1) Urea and ammonia

Urea recycling in the inner medulla also contributes to the osmotic gradient generated by the loops of Henle. Antidiuretic hormone increases water permeability, but not urea permeability in the cortical and outer medullary collecting ducts, causing urea to concentrate in the tubular fluid in this segment.

Answer 2

Answer:

option 4 is your answer dear

Explanation:

sodium chloride and urea maintain counter current mechanism