Q. No.Which part of the nephrons is impermeable to water?
1. Proximal convoluted tubule
2. Distal convoluted tubule
3. Ascending limb of loop of Henle
4. Descending limb of loop of Henle
1. Proximal convoluted tubule
2. Distal convoluted tubule
3. Ascending limb of loop of Henle
4. Descending limb of loop of Henle
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Which of the following process of urine formation takes place all along the renal tubule and collecting duct?
1. Ultrafiltration and tubular reabsorption
2. Ultrafiltration and tubular secretion
3. Tubular reabsorption and secretion
4. Anti-current mechanism and reabsorption
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In man, in which part of the uriniferous tubule reabsorption of glucose occurs?
1. Collecting tube
2. Henle's loop
3. Distal convoluted tubule
4. Proximal convoluted tubule
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What is true of urea biosynthesis?
1. Uric acid is the starting point
2. Urea is synthesized in lysosomes
3. Urea cycle enzymes are located inside mitochondria
4. Urea is synthesized in the kidney
Consider the following statements:
| I: | Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic. |
| II: | Mammals, many terrestrial amphibians and cartilaginous fishes are ureotelic. |
| III: | Reptiles, birds, land snails and insects are uricotelic. |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II, and III
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Consider the following statements:
I. The DCTs of many nephrons open into the collecting duct.
II. In cortical nephrons, loop of Henle is short and does not extend into medulla.
III. Vasa recta is absent or highly reduced in cortical nephrons.
Which of the above statements are true?
1. I and II only 2. I and III only
3. II and III only 4. I, II, and III
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In the given diagram what would be the value of osmolality of fluid at points A and B respectively?
1. 1000 and 1000
2. 1200 and 1000
3. 1000 and 1200
4. 1200 and 1200
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The component of blood which prevents its coagulation in the blood vessels is
1. haemoglobin
2. plasma
3. thrombin
4. heparin.
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In a glomerulus
1. Afferent arteriole is thicker than efferent arteriole
2. Afferent capillaries are thicker than efferent capillaries
3. Afferent capillaries are thinner than efferent capillaries
4. Afferent arteriole are thinner than efferent arteriole
Assertion: Unlike bony fishes, marine sharks are not hypoosmotic to seawater.
Reason: Like bony fishes, marine sharks have an internal salt concentration much lower than that of seawater.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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