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Q. No.Urine formation involves three main processes, including all of the following, except:
1. Glomerular filtration
2. Reabsorption
3. Tubular secretion
4. Synthesis of urea by JG cells
Subtopic: Formation of Urine |
96%
From NCERT
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On an average, 1100-1200 ml of blood is filtered by the kidneys per minute which constitute roughly:
| 1. | 10% of the blood pumped out by each ventricle of the heart in a minute. |
| 2. | 20% of the blood pumped out by each ventricle of the heart in a minute. |
| 3. | 30% of the blood pumped out by each ventricle of the heart in a minute. |
| 4. | 40% of the blood pumped out by each ventricle of the heart in a minute. |
Subtopic: Formation of Urine |
78%
From NCERT
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The epithelial cells of Bowman’s capsule, arranged in an intricate manner so as to leave some minute spaces called filtration slits or slit pores, are called as:
| 1. | Macula densa | 2. | Juxtaglomerular cells |
| 3. | Podocytes | 4. | Mesangial cells |
Subtopic: Formation of Urine |
96%
From NCERT
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Consider the two statements:
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: | JGA is a special sensitive region formed by cellular modifications in the proximal convoluted tubule and the efferent arteriole at the location of their contact. |
| Statement II: | A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal. |
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: Formation of Urine |
79%
From NCERT
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Consider the given two statements:
| Assertion (A): | Tubular secretion helps in the maintenance of ionic and acid-base balance of body fluids. |
| Reason (R): | During urine formation, the tubular cells secrete substances like H+, K+ and ammonia into the filtrate. |
| 1. | (A) is True but (R) is False. |
| 2. | Both (A) and (R) are True and (R) correctly explains (A). |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Formation of Urine |
81%
From NCERT
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Proximal Convoluted Tubule (PCT) is lined by:
1. simple cuboidal brush border epithelium
2. simple cuboidal ciliated epithelium
3. simple columnar brush border epithelium
4. simple columnar ciliated epithelium
1. simple cuboidal brush border epithelium
2. simple cuboidal ciliated epithelium
3. simple columnar brush border epithelium
4. simple columnar ciliated epithelium
Subtopic: Nephron Part 1 | Nephron Part 2 |
92%
From NCERT
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The maximum amount of water from the glomerular filtrate is reabsorbed in the nephron by:
1. Proximal Convoluted Tubule (PCT)
2. Distal Convoluted Tubule (DCT)
3. Loop of Henle – ascending limb
4. Loop of Henle – descending limb
1. Proximal Convoluted Tubule (PCT)
2. Distal Convoluted Tubule (DCT)
3. Loop of Henle – ascending limb
4. Loop of Henle – descending limb
Subtopic: Nephron Part 1 | Nephron Part 2 |
84%
From NCERT
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The part of the nephron that plays a significant role in the maintenance of high osmolarity of medullary interstitial fluid is:
1. Proximal Convoluted Tubule (PCT)
2. Distal Convoluted Tubule (DCT)
3. Loop of Henle – ascending limb
4. Loop of Henle – descending limb
1. Proximal Convoluted Tubule (PCT)
2. Distal Convoluted Tubule (DCT)
3. Loop of Henle – ascending limb
4. Loop of Henle – descending limb
Subtopic: Nephron Part 1 | Nephron Part 2 |
61%
From NCERT
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A counter-current exists in the human kidneys between:
1. Only III is correct
2. Only I and II are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | the two limbs of Henle’s loop. |
| II: | the two limbs of vasa recta. |
| III: | the Henle’s loop and vasa recta. |
2. Only I and II are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Concentration of Urine |
63%
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 |
83%
From NCERT
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