What Mechanisms Are Responsible for Producing Concentrated Urine

question 64

Multiple Choice

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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