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Q. No.Select the option which shows the correct matching of animal with excretory organs and excretory product:
Animal
Excretory organs
Excretory product
1.
Labeo (Rohu)
Nephridial tubes
Ammonia
2.
Salamander
Kidney
Urea
3.
Peacock
Kidney
Urea
4.
Housefly
Renal tubules
Uric acid
Subtopic: Nitrogenous Excretory Products |
Level 3: 35%-60%
NEET - 2013
Hints
Consider the two statements:
| Assertion (A): | An excess of aldosterone can cause a decrease in potassium ion concentration in body fluids. |
| Reason (R): | Aldosterone acts mainly at the renal tubules and stimulates the reabsorption of Na+ and water. |
| 1. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are False. |
| 4. | Both (A) and (R) are True and (R) correctly explains (A). |
Subtopic: Autoregulation of GFR |
56%
Level 3: 35%-60%
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
In light of the above statements, choose the correct answer from the options given below:
| 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 |
| 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 |
Level 3: 35%-60%
NEET - 2023
Hints
Given below are two statements:
| Assertion (A): | Vasa recta and Henle's loop play a significant role in maintaining high osmolarity of medullary interstitial fluid |
| Reason (R): | Osmolarity increases from 300 mOsmolL-1 to 1200 mOsmolL-1 as we move from cortex to medullary region |
| 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: Concentration of Urine |
58%
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | Na+ reabsorption from glomerular filtrate occurs in PCT, ascending limb of loop of Henle and collecting duct |
| Reason (R): | Na+ is always reabsorbed by passive process in PCT, ascending limb of loop of Henle and collecting duct |
| 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: Formation of Urine: Ultrafiltration |
Level 3: 35%-60%
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Identify the correct statements:
| I: | Each kidney of an adult human measures 10-12 cm in length, 5-7 cm in width and 2-3 cm in thickness. |
| II: | The DCTs of many nephrons open into a straight tube called collecting duct. |
| III: | Each nephron has two parts – the glomerulus and the renal tubule. |
| IV: | The renal tubule begins with the proximal convoluted tubule. |
| 1. | Only I and II | 2. | Only I, II and III |
| 3. | Only II and III | 4. | I, II, III and IV |
Subtopic: Human Kidney: Functions | Human Kidney: Location & Cut Section |
Level 3: 35%-60%
Hints
Vasa recta:
1. Only I is correct
2. Only II and III are correct
3. Only III is correct
4. I, II and III are correct
| I: | is a fine capillary network around the renal tubule formed by efferent arteriole. |
| II: | runs parallel to the Henle’s loop in juxtamedullary nephrons. |
| III: | is absent or highly reduced in cortical nephrons. |
2. Only II and III are correct
3. Only III is correct
4. I, II and III are correct
Subtopic: Human Kidney: Functions |
Level 4: Below 35%
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During the concentration of urine by human kidneys:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Small amounts of urea is transported back to medullary interstitium by ascending portion of vasa recta |
| II: | NaCl is returned to the medullary interstitium by the descending portion of vasa recta |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Concentration of Urine: I |
51%
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | The ascending limb of loop of Henle is also called the diluting segment of the nephron. |
| Reason (R): | In the ascending portion, the loop becomes impermeable to water and the cells of the loop actively reabsorb solutes from the luminal fluid. |
| 1. | (A) is True but (R) is False. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
Subtopic: Formation of Urine: Ultrafiltration 1 | Formation of Urine: Ultrafiltration 2 | Formation of Urine: Ultrafiltration |
58%
Level 3: 35%-60%
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Approximately what amount of carbon dioxide is removed by lungs per hour in a healthy resting individual?
| 1. | 200 ml | 2. | 12 L |
| 3. | 122 L | 4. | 288 L |
Subtopic: Role of other Organs in Excretion |
54%
Level 3: 35%-60%
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