Q. No.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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Collecting duct does not:
| I: | allow reabsorption of large amount of water during concentration of urine. |
| II: | allow passage of small amounts of urea into medullary interstitium to keep up the osmolarity. |
| III: | play a role in the maintenance of pH and ionic balance of blood by the selective secretion of H+ and K+ ions. |
| 1. | Only I and II | 2. | Only III |
| 3. | Only II | 4. | I, II and III are incorrect |
Subtopic: Nephron Part 1 | Nephron Part 2 | Concentration of Urine |
51%
From NCERT
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What would be true about the role of collecting duct in the concentration of urine by the kidneys?
| I: | Allows passage of small amounts of urea into the medullary interstitium |
| II: | Large amounts of water could be reabsorbed from this part to produce a concentrated urine. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Nephron Part 1 | Nephron Part 2 | Concentration of Urine |
81%
From NCERT
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Identify the correct statements:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | The flow of filtrate in the two limbs of Henle’s loop is in opposite directions and thus forms a counter current. |
| II: | The flow of blood through the two limbs of vasa recta is also in a counter current pattern. |
| III: | Although there is proximity between the Henle’s loop and vasa recta, yet they do not form a counter current. |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Concentration of Urine |
85%
From NCERT
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The average osmolality of most of the body fluids in the human body under normal physiological condition is about:
1. 300 mOsmolL–1
2. 600 mOsmolL–1
3. 900 mOsmolL–1
4. 1200 mOsmolL–1
1. 300 mOsmolL–1
2. 600 mOsmolL–1
3. 900 mOsmolL–1
4. 1200 mOsmolL–1
Subtopic: Concentration of Urine: I | Concentration of Urine: II | Concentration of Urine |
70%
From NCERT
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Consider the given two statements regarding the mechanism of increasing medullary interstitium osmolarity when kidney is trying to produce concentrated urine:
1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
| Statement I: | NaCl is transported by the ascending limb of Henle’s loop which is exchanged with the descending limb of vasa recta. |
| Statement II: | NaCl is returned to the interstitium by the ascending portion of vasa recta. |
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
Subtopic: Concentration of Urine |
84%
From NCERT
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The osmolarity of interstitial fluid in renal cortex of vertebrates is about _____ mOsm per litre, which can be increased to about _______ mOsm per litre in the inner medulla during concentration of urine by the kidneys.
| 1. | 1200, 300 | 2. | 300, 1200 |
| 3. | 300, 600 | 4. | 600, 300 |
Subtopic: Concentration of Urine |
93%
From NCERT
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The region of human kidney where you expect to find maximum osmolarity is:
1. at the top of the renal cortex
2. at the bottom of the renal cortex
3. at the top of the renal medulla
4. at the bottom of the renal medulla
Subtopic: Concentration of Urine |
76%
From NCERT
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The human kidneys can produce urine concentrated nearly:
1. two times than the initial filtrate formed.
2. four times than the initial filtrate formed.
3. six times than the initial filtrate formed.
4. eight times than the initial filtrate formed.
1. two times than the initial filtrate formed.
2. four times than the initial filtrate formed.
3. six times than the initial filtrate formed.
4. eight times than the initial filtrate formed.
Subtopic: Concentration of Urine |
94%
From NCERT
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JG cells can be activated to release renin by all the following except:
1. A fall in glomerular blood flow
2. A fall in glomerular blood pressure
3. An increase in venous return to the heart
4. A fall in GFR
Subtopic: Concentration of Urine |
86%
From NCERT
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