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Q. No.Consider the given two statements:
Assertion (A):
Juxtamedullary nephrons play very important role in concentration of urine.
Reason (R):
Juxtamedullary nephrons constitute about 85% of all nephrons in human kidneys.
1.
Both (A) and (R) are True and (R) correctly explains (A)
2.
Both (A) and (R) are True but (R) does not correctly explain (A)
3.
(A) is True but (R) is False
4.
(A) is False but (R) is True
Subtopic: Human Kidney: Location & Cut Section | Nephron Part 1 | Nephron Part 2 |
75%
From NCERT
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Which of the following are vasoconstrictors?
A: Antidiuretic hormone
B: Angiotensin II
C: Atrial natriuretic factor
1. Only A and B
2. Only B
3. Only A and C
4. A, B and C
Subtopic: Osmoregulation |
77%
From NCERT
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In majority of the nephrons in the human kidney,
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
| A: | The loop of Henle is short and extends only very little into the medulla. |
| B: | Vasa recta is absent or highly reduced. |
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Subtopic: Nephron Part 1 |
92%
From NCERT
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Identify the incorrect statement:
| 1. | Lungs remove large amount of carbon dioxide. |
| 2. | Sweat contains sodium chloride, small amount of urea and lactic acid. |
| 3. | Sebaceous glands eliminate sterols, hydrocarbons, and waxes. |
| 4. | Saliva does not eliminate any nitrogenous waste |
Subtopic: Role of other Organs in Excretion |
92%
From NCERT
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Consider the given two statements:
| Assertion (A): | Ammonia is considered to be a less toxic excretory product compared to urea and uric acid. |
| Reason (R): | Ammonia requires a large amount of water for its elimination due to its high solubility and toxic nature. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A). |
| 3. | (A) is True, (R) is False. |
| 4. | (A) is False, (R) is True. |
Subtopic: Nitrogenous Excretory Products |
90%
From NCERT
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Where, within the loop of Henle, do you expect that the fluid will be most concentrated?
1. In the ascending limb
2. In the descending limb
3. At the hairpin bend
4. Just when it is joining the distal convoluted tubule
1. In the ascending limb
2. In the descending limb
3. At the hairpin bend
4. Just when it is joining the distal convoluted tubule
Subtopic: Nephron Part 1 | Nephron Part 2 | Concentration of Urine |
From NCERT
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Consider the given two statements:
| Assertion (A): | Juxtamedullary nephrons are crucial for the process of urine concentration. |
| Reason (R): | They have longer loops of Henle, which extend deep into the medulla, allowing more effective water reabsorption. |
| 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: Nephron Part 1 | Nephron Part 2 |
90%
From NCERT
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Match the following excretory organs with the correct animal:
Codes:
| Column I | Column II | ||
| A | Kidneys | P | Humans |
| B | Malpighian tubules | Q | Birds |
| C | Green glands | R | Crabs |
| D | Cloaca | S | Insects |
| A | B | C | D | |
| 1. | P | R | S | Q |
| 2. | R | P | Q | S |
| 3. | P | S | R | Q |
| 4. | S | P | Q | R |
Subtopic: Nitrogenous Excretory Products |
93%
From NCERT
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Consider the given two statements:
1. Only A is correct.
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
| A: | Glomerulus is a tuft of capillaries formed by the afferent arteriole. |
| B: | Vasa recta is absent or highly reduced in cortical nephrons. |
2. Only B is correct.
3. Both A and B are correct.
4. Both A and B are incorrect.
Subtopic: Nephron Part 1 |
86%
From NCERT
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Cortical nephrons differ from juxtamedullary nephrons in that:
| 1. | Cortical nephrons are primarily involved in the filtration of blood. |
| 2. | Juxtamedullary nephrons have a longer loop of Henle that extends deep into the medulla. |
| 3. | Cortical nephrons are absent in mammals. |
| 4. | Juxtamedullary nephrons are not involved in the concentration of urine. |
Subtopic: Nephron Part 1 |
95%
From NCERT
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