| 1. | An excessive loss of fluid from the body can activate the osmoreceptors which stimulate the hypothalamus to release antidiuretic hormone (ADH) or vasopressin from the neurohypophysis. |
| 2. | An increase in body fluid volume can switch off the osmoreceptors and suppress the ADH release. |
| 3. | ADH can also affect the kidney function by its dilatory effects on blood vessels. |
| 4. | An increase in blood pressure can increase the glomerular blood flow and thereby the GFR. |
| I: | the two limbs of Henle’s loop. |
| II: | the two limbs of vasa recta. |
| III: | the Henle’s loop and vasa recta. |
| I: | extends from the cortex of the kidney to the inner parts of the medulla. |
| II: | can reabsorb water to produce a concentrated urine. |
| III: | allows passage of small amounts of urea into the medullary interstitium to keep up the osmolarity. |
| IV: | plays a role in the maintenance of pH and ionic balance of blood by the selective secretion of H+ and K+ ions. |
| 1. | 10 % | 2. | 20 % |
| 3. | 30 % | 4. | 40 % |
| 1. | 10% of the blood pumped out by each ventricle of the heart in a minute. |
| 2. | 20% of the blood pumped out by each ventricle of the heart in a minute. |
| 3. | 30% of the blood pumped out by each ventricle of the heart in a minute. |
| 4. | 40% of the blood pumped out by each ventricle of the heart in a minute. |
| Statement I: | The Malpighian corpuscle, PCT and DCT of the nephron are situated in the cortical region of the kidney. |
| Statement II: | In majority of nephrons, the loop of Henle extends very deep into the medulla. |
| 1. | Afferent arteriole | 2. | Efferent arteriole |
| 3. | Vasa recta | 4. | Peri tubular capillary |
| 1. | last thoracic and third lumbar vertebra close to the dorsal inner wall of the abdominal cavity. |
| 2. | last thoracic and third lumbar vertebra close to the ventral inner wall of the abdominal cavity. |
| 3. | tenth thoracic and first lumbar vertebra close to the dorsal inner wall of the abdominal cavity. |
| 4. | tenth thoracic and first lumbar vertebra close to the ventral inner wall of the abdominal cavity. |