Q. No.The maximum amount of electrolytes and water (70-80%) from the glomerular filtrate is reabsorbed in which part of the nephron?
1. Ascending limb of loop of Henle
2. Distal convoluted tubule
3. Proximal convoluted tubule
4. Descending limb of loop of Henle
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| 1. | glomerulus is a tuft of capillaries formed by the efferent arteriole |
| 2. | vasa recta is highly reduced in juxtamedullary nephrons |
| 3. | DCTs of many nephrons open into a straight tube called collecting duct |
| 4. | columns of Bertini are extensions of medulla into the cortex |
| 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 |
| I: | Glomerulus is a tuft of capillaries formed by the efferent arteriole |
| II: | Afferent arteriole forms the peritubular capillary network |
| III: | Vasa recta is absent or highly reduced in juxtamedullary nephrons |
| 1. | Only III is correct |
| 2. | I is correct but II and III are incorrect |
| 3. | I, II and III are incorrect |
| 4. | I and II are correct |
| I: | is lined by cuboidal brush bordered epithelium |
| II: | reabsorbs 70-80 percent of electrolytes and water |
| 1. | Proximal convoluted tubule |
| 2. | Loop of Henle |
| 3. | Distal convoluted tubule |
| 4. | Collecting duct |
Match the parts of the nephron in Column I with function/feature in Column II and select the answer from the codes given:
| COLUMN I | COLUMN II | ||
| A. | PCT | a. | Maximum reabsorption of water and electrolytes |
| B. | Loop of Henle - descending limb | b. | Permeable to water but almost impermeable to electrolytes |
| C. | Loop of Henle - ascending limb | c. | Impermeable to water but permeable to electrolytes |
| D. | DCT | d. | Conditional reabsorption of Na+ and water |
Codes
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | b | a | d | c |
| 3. | a | b | d | c |
| 4. | b | a | d | c |
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| 1. | Glomerulus is a tuft of capillaries formed by afferent arteriole. |
| 2. | Blood from the glomerulus is carried away by an efferent arteriole. |
| 3. | Vasa recta is well developed in cortical nephrons. |
| 4. | The DCTs of many nephrons open into a straight tube called collecting duct. |
Consider the given two statements:
I. Human kidneys can produce urine nearly four times concentrated than the initial filtrate formed.
II. About 85% of the nephrons in the human kidney are juxtamedullary nephrons.
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. Both I and II are incorrect
The Bowman's capsule and glomerulus constitute the:
| 1. Malpighian tubule | 2. Renal corpuscle |
| 3. Nephron | 4. Collecting system |
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Which of the following statements is correct?
1. The descending limb of loop of Henle is impermeable to water.
2. The ascending limb of loop of Henle is permeable to water.
3. The descending limb of loop of Henle is permeable to electrolytes.
4. The ascending limb of loop of Henle is impermeable to water.
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