What mechanisms are responsible for producing concentrated urine?
A) The juxtamedullary nephrons become active.
B) The counter-current mechanism pulls out much water.
C) Vasopressin causes facultative water reabsorption in distal tubule.
D) All of these.
E) The counter-current mechanism pulls out much water, and vasopressin causes facultative water reabsorption in distal tubule.

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The Answer of What mechanisms are responsible for producing concentrated urine?
A) The juxtamedullary nephrons become active.
B) The counter-current mechanism pulls out much water.
C) Vasopressin causes facultative water reabsorption in distal tubule.
D) All of these.
E) The counter-current mechanism pulls out much water, and vasopressin causes facultative water reabsorption in distal tubule.

What Mechanisms Are Responsible for Producing Concentrated Urine