Which of the following nephrons play important role in production of concentrated urine?
Correct answer: C. Juxtramedullary
- A. Crotical
- B. Medullary
- C. Juxtramedullary
- D. None of these
Explanation
Juxtamedullary nephrons have long loops of Henle extending deep into the medulla, along with vasa recta that support the countercurrent mechanism for concentrating urine. The likely mistake is cortical nephrons, which are more numerous but have shorter loops and contribute less to urine concentration.
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