Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A):  Ascending limb of the loop of Henle is impermeable to water and allows transport of electrolytes actively or passively. 
Reason (R):  Dilution of filtrate takes place due to efflux of electrolytes in the medullary fluid

In light of the above statements, choose the correct answer from the options given below:
1.  (A) is True, (R) is False
2.  (A) is False, (R) is True
3.  Both (A) and (R) are True and (R) is the correct explanation of (A)
4.  Both (A) and (R) are True but (R) is not the correct explanation of (A)
Subtopic:  Function of the tubules |
From NCERT
NEET - 2023
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital

In order to produce concentrated urine, a large amount of water could be reabsorbed in the human kidney from:
1. PCT 2. Henle's loop
3. DCT 4. Collecting duct
Subtopic:  Function of the tubules |
From NCERT
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Long loops of Henle on juxtamedullary nephrons allow for greater concentration of urine. For an individual with highly concentrated urine, filtrate entering the loop of Henle is likely to be:
1. more concentrated than filtrate exiting the loop Henle.
2. less concentrated than filtrate exiting the loop of Henle.
3. more voluminous than filtrate exiting the loop of Henle.
4. less voluminous than filtrate exiting the loop of Henle.
Subtopic:  Function of the tubules |
From NCERT
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