Statement I: | In the nephron, the descending limb of loop of Henle is impermeable to water and permeable to electrolytes. |
Statement II: | The proximal convoluted tubule is lined by simple columnar brush border epithelium and increases the surface area for reabsorption. |
Assertion (A): | Ascending limb of the loop of Henle is impermeable to water and allows transport of electrolytes actively or passively. |
Reason (R): | Dilution of filtrate takes place due to efflux of electrolytes in the medullary fluid |
1. | (A) is True, (R) is False |
2. | (A) is False, (R) is True |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A) |