Assertion (A): Counter current mechanism operates in juxta-medullary nephrons.
Reason (R): In juxta-medullary nephrons loop of Henle is present only in cortex region and in close proximity with vasa recta.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Human Kidney: Location & Cut Section |Â Nephron Part 1 |Â Nephron Part 2 |
 72%
Level 2: 60%+
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Assertion (A): Diabetes insipidus is marked by excessive urination and too much thirst.
Reason (R): Anti-Diuretic hormone (ADH) is released from posterior lobe of pituitary gland
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Anti-Diuretic hormone (ADH) is released from posterior lobe of pituitary gland
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Autoregulation of GFR |Â Micturition Reflex |
 75%
Level 2: 60%+
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Assertion (A): In the descending limb of loop of Henle, the urine is hypertonic while in ascending limb of loop of Henle, the urine is hypotonic
Reason (R): Descending limb of loop of Henle is permeable to water, and ascending limb is impermeable to salts
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Descending limb of loop of Henle is permeable to water, and ascending limb is impermeable to salts
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Nephron Part 1 |Â Nephron Part 2 |
 63%
Level 2: 60%+
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Assertion (A): Atrial Natriuretic Factor is released by wall of atria.
Reason (R): It inhibits the release of renin from juxtaglomerular apparatus.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): It inhibits the release of renin from juxtaglomerular apparatus.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Autoregulation of GFR |
 61%
Level 2: 60%+
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In a juxtamedullary nephron, which part dips deep into the renal medulla?
1. Malpighian corpuscle
2. PCT
3. DCT
4. Loop of Henle
1. Malpighian corpuscle
2. PCT
3. DCT
4. Loop of Henle
Subtopic: Â Nephron Part 1 |Â Nephron Part 2 |
 93%
Level 1: 80%+
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Consider the two statements:
| Assertion (A): | ANF mechanism acts as a check on the renin-angiotensin mechanism. |
| Reason (R): | ANF can cause vasodilation (dilation of blood vessels) and thereby decrease blood pressure. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are False. |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Â Autoregulation of GFR |
 84%
Level 1: 80%+
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Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | Protonephridia or flame cells are the excretory structures in Aschelminthes. |
| Statement II: | Reptiles, birds, land snails, and insects are uricotelic animals. |
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Â Nitrogenous Excretory Products |
 74%
Level 2: 60%+
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Consider the two statements:
| Assertion (A): | As the filtrate passes upward in the ascending limb of the Loop of Henle, it gets diluted. |
| Reason (R): | The ascending limb is impermeable to water but allows the transport of electrolytes actively or passively. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Nephron Part 1 |Â Nephron Part 2 |
 81%
Level 1: 80%+
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The part of the nephron that reabsorbs electrolytes but does not reabsorb any water is:
| 1. | Descending limb of loop of Henle |
| 2. | Ascending limb of loop of Henle |
| 3. | PCT |
| 4. | DCT |
Subtopic: Â Nephron Part 1 |Â Nephron Part 2 |
 83%
Level 1: 80%+
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Which of the following organism is not uricotelic?
1. Land snails
2. Reptiles
3. Insects
4. Aquatic amphibians
1. Land snails
2. Reptiles
3. Insects
4. Aquatic amphibians
Subtopic: Â Nitrogenous Excretory Products |
 92%
Level 1: 80%+
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