Statement I: | JGA is a special sensitive region formed by cellular modifications in the proximal convoluted tubule and the efferent arteriole at the location of their contact. |
Statement II: | A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal. |
Assertion (A): | Tubular secretion helps in the maintenance of ionic and acid-base balance of body fluids. |
Reason (R): | During urine formation, the tubular cells secrete substances like H+, K+ and ammonia into the filtrate. |
1. | (A) is True but (R) is False. |
2. | Both (A) and (R) are True and (R) correctly explains (A). |
3. | (A) is False but (R) is True. |
4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
I: | the two limbs of Henle’s loop. |
II: | the two limbs of vasa recta. |
III: | the Henle’s loop and vasa recta. |
Statement I: | NaCl is transported by the ascending limb of Henle’s loop which is exchanged with the descending limb of vasa recta. |
Statement II: | NaCl is returned to the interstitium by the ascending portion of vasa recta. |
1. | It converts angiotensinogen in blood to angiotensin I. |
2. | It is a powerful vasodilator. |
3. | It causes reabsorption of Na+ and water from the distal parts of the tubule. |
4. | It activate the JG cells to release rennin. |