Q. No.Beginning from the collecting duct, arrange the following structures in the correct sequence in which urine passes to the external environment: (A) ureter, (B) renal pelvis, (C) calyx, (D) urinary bladder, (E) urethra.
1. A, B, C, D, E
2. C, D, A, E, B
3. C, B, A, D, E
4. B, D, A, C, E
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A counter current mechanism for concentration of urine exists between:
1. Ascending limb of vasa recta and ascending limb of loop of Henle
2. Descending limb of vasa recta and descending limb of loop of Henle
3. Collecting duct and ascending limb of loop of Henle
4. Collecting duct and descending limb of loop of Henle
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A capillary network around the renal tubule is formed by:
| 1. Afferent arteriole | 2. Efferent arteriole |
| 3. Vasa recta | 4. Arcuate artery |
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Removal rate of carbon dioxide by lungs is approximately:
| 1. | 125 ml/minute | 2. | 200 ml/minute |
| 3. | 280 ml/minute | 4. | 325 ml/minute |
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Identify the incorrectly matched pair [assume normal physiological conditions]:
1. GFR – 125 ml/min
2. Amount of urea produced – 25 to 30 mg/day
3. Average urine output – 1 to 1.5 liter/day
4. Average amount of blood filtered by kidney – 1100 to 1200 ml/min
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The proximal convoluted tubule of the nephron is lined by:
1. simple ciliated cuboidal epithelium
2. simple ciliated columnar epithelium
3. compound cuboidal brush bordered epithelium
4. simple cuboidal brush bordered epithelium
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In hemodialysis, the role of artificial kidney is actually played by:
| 1. | Dialysate | 2. | Blood pump |
| 3. | Water system | 4. | Cellulose membrane |
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The increasing gradient of osmolarity in medullary interstitium, during concentration of urine, is mainly caused by reabsortion of:
| 1. | NaCl from ascending limb of loop of Henle and of urea by collecting duct |
| 2. | NaCl from descending limb of loop of Henle and of urea by collecting duct |
| 3. | NaCl from ascending limb of loop of Henle and of urea by PCT |
| 4. | NaCl from descending limb of loop of Henle and of urea by PCT |
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An excessive loss of body fluid can:
1. activate osmoreceptors, stimulating hypothalamus to release ADH and thereby preventing diuresis
2. switch off osmoreceptors, suppressing release of ADH promoting diuresis
3. activate osmoreceptors, stimulating hypothalamus to release ADH and thereby promoting diuresis
4. switch off osmoreceptors, suppressing release of ADH preventing diuresis
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Protonephridia are the excretory structures in all the following except:
| 1. Planaria | 2. Rotifers |
| 3. Amphioxus | 4. Prawns |
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