Q. No.Uricotelic mode of passing out nitrogenous wastes is found in
1. reptiles and bird
2. birds and annelids
3. amphibians and reptiles
4. insects and amphibians
As the filtrate passes upward in the ascending limb of loop of Henle:
1. it gets diluted due to the reabsorption of water from medullary interstitium
2. it gets diluted due to the passage of electrolytes to medullary interstitium
3. it gets concentrated due to the reabsorption of electrolytes from medullary interstitium
4. it gets concentrated due to the passage of water to medullary interstitium
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Juxtamedullary nephrons:
1. are more common than cortical nephrons
2. do not have a well developed vasa recta associated with them
3. play a very important role in concentration of urine
4. produce angiotensinogen
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The location of kidneys in humans can be best described as:
1. between last thoracic and third lumbar vertebra close to dorsal inner wall of abdominal cavity
2. between last thoracic and third lumbar vertebra close to ventral inner wall of abdominal cavity
3. between 10th thoracic and third lumbar vertebra close to dorsal inner wall of abdominal cavity
4. between 10th thoracic and third lumbar vertebra close to ventral inner wall of abdominal cavity
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Urination will be caused by simultaneous:
1. contraction of smooth muscle of bladder and relaxation of urethral sphincter
2. relaxation of smooth muscle of bladder and contraction of urethral sphincter
3. contraction of smooth muscle of bladder and urethral sphincter
4. relaxation of smooth muscle of bladder and urethral sphincter
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During concentration of urine, NaCl is returned to medullary interstitium by:
1. Ascending limb of Loop of Henle
2. Descending limb of Loop of Henle
3. Ascending limb of Vasa Recta
4. Descending limb of Vasa Recta
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During the counter current mechanism, small amount of urea from interstitium enters:
1. the collecting duct
2. the thin segment of ascending limb of loop of Henle
3. the ascending limb of vasa recta
4. the descending limb of vasa recta
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What is the number of times that the human kidneys can maximally concentrate the initial filtrate?
| 1. | 2 | 2. | 4 |
| 3. | 6 | 4. | 8 |
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What acts as a check on the renin-angiotensin mechanism?
| 1. | ANF | 2. | ADH |
| 3. | Aldosterone | 4. | Erythropoietin |
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Consider the two statements:
| I: | The process of filtration at Malpighian body is regarded as ultrafiltration. |
| II: | Blood is filtered so finely that all constituents of plasma pass into the lumen of Bowman’s capsule. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct but II is incorrect |
| 4. | I is incorrect but II is correct |
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