What creates the osmotic gradient in the renal medulla?
A) passive transport of solute out of the distal tubules and collecting ducts
B) special transport systems of the loops of Henle of cortical nephrons
C) active transport of solute out of the distal tubules and collecting ducts
D) active transport of solute out of the proximal tubule
E) special transport systems of the loops of Henle of juxtamedullary nephrons

Question

Quizplus · Accepted Answer

The osmotic gradient in the renal medulla is primarily created by the special transport systems of the loops of Henle of juxtamedullary nephrons. These nephrons have long loops that extend deep into the medulla, allowing for the efficient reabsorption of water and solutes, which contributes to the concentration of urine.

What Creates the Osmotic Gradient in the Renal Medulla