NEET Zoology Urine Formation MCQ Question
Which of the following statements regarding urine formation is correct?
The loop of Henle plays a crucial role in creating an osmotic gradient for water reabsorption.
Collecting ducts are impermeable to urea, preventing its passage into the medullary interstitium.
Glomerular filtration rate (GFR) is primarily regulated by the size of the renal corpuscle.
Counter current mechanisms in the nephron ensure that water is reabsorbed efficiently, concentrating urine.
Correct Answer
Detailed Explanation
The loop of Henle is essential for maintaining an osmotic gradient, which facilitates water reabsorption in the collecting ducts, leading to concentrated urine formation. This is supported by the NCERT context that discusses the roles of the loop of Henle and the interstitial gradient in urine concentration.
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