MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is responsible for the secretion of ANF? |
| A. | Heart |
| B. | Brain |
| C. | Kidneys |
| D. | Intestine |
| Answer» B. Brain | |
| 2. |
Which of the following is released by JG cells when GFR falls its normal levels? |
| A. | Renin |
| B. | Rennin |
| C. | Lipase |
| D. | ADH |
| Answer» B. Rennin | |
| 3. |
What is ADH? |
| A. | Vasodilator |
| B. | Phagocytic |
| C. | Receptor |
| D. | Vasoconstrictor |
| Answer» E. | |
| 4. |
What will happen if the blood volume increases? |
| A. | Switch off the osmoreceptors |
| B. | Osmoreceptors get activated |
| C. | Osmoreceptors get permanently deactivated |
| D. | Osmoreceptors do not play a significant role |
| Answer» B. Osmoreceptors get activated | |
| 5. |
The hypothalamus releases vasopressin from the adenohypophysis. |
| A. | True |
| B. | False |
| Answer» C. | |
| 6. |
Osmoreceptors in the body is not directly activated by which of the following? |
| A. | Ionic concentration |
| B. | Blood volume |
| C. | Body fluid volume |
| D. | Blood pressure |
| Answer» E. | |
| 7. |
Which of the following are not involved in the monitoring of kidneys? |
| A. | Hypothalamus |
| B. | Heart |
| C. | Eyes |
| D. | JGA |
| Answer» D. JGA | |
| 8. |
Which of the following is not a feature of a counter-current mechanism? |
| A. | Helps in maintaining the concentration gradient |
| B. | Helps in making the passage of water easier |
| C. | Helps in concentrating the urine |
| D. | Helps in diluting the urine |
| Answer» E. | |
| 9. |
Which of the following structure make the countercurrent mechanism? |
| A. | Henle s loop and glomerulus |
| B. | PCT and DCT |
| C. | Henle s loop and vasa recta |
| D. | Vasa recta and collecting duct |
| Answer» D. Vasa recta and collecting duct | |
| 10. |
Which of the following returns NaCl into the interstitium? |
| A. | Ascending loop of Henle |
| B. | Descending loop of Henle |
| C. | Ascending portion of the vasa recta |
| D. | Descending portion of the vasa recta |
| Answer» D. Descending portion of the vasa recta | |
| 11. |
The gradient of osmolarity is mainly caused by NaCl. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
What is the osmolarity of the urine in the cortex? |
| A. | 300 mOsmol/L |
| B. | 600 mOsmol/L |
| C. | 900 mOsmol/L |
| D. | 1200 mOsmol/L |
| Answer» B. 600 mOsmol/L | |
| 13. |
What is the significance of the proximity of Henle s loop and vasa recta? |
| A. | Maintains osmolarity |
| B. | Maintains the concentration of only water |
| C. | For reabsorption of nutrients |
| D. | No proximity at all |
| Answer» B. Maintains the concentration of only water | |
| 14. |
What is meant by counter-current? |
| A. | When blood flows in the opposite direction in two limbs of the Henle s loop |
| B. | When the blood flows in the same direction in two limbs of the Henle s loop |
| C. | When the blood does not flow through any of the limbs of Henle s loop |
| D. | When some blood flows in Henle s loop and the other blood flows in the vasa recta |
| Answer» B. When the blood flows in the same direction in two limbs of the Henle s loop | |
| 15. |
Which of the following plays a significant role in the concentration of urine? |
| A. | Henle s loop and vasa recta |
| B. | PCT and DCT |
| C. | Glomerulus and Bowman s capsule |
| D. | Collecting duct and tubule |
| Answer» B. PCT and DCT | |