Conditional reabsorption of sodium and water takes place in which of the following segments?

1. PCT

2. DCT

3. AL of LOH

4. DL of LOH

Which of the following does not get selectively secreted by DCT cells?

1. K+

2. H+

3. Ammonia

4. Carbonate

Which segment allows the passage of small amounts of urea into the medullary interstitium to keep up the osmolarity?

1. PCT

2. DCT

3. LOH

4. Collecting Duct

Which of the following organisms have the capacity to concentrate urine?

1. Mammals

2. Fishes

3. Reptiles

4. Amphibians

Which of the following is not important for maintaining the increasing osmolarity in the medullary interstitium?

1. The proximity between Henle's loop and vasa recta

2. Counter current flow in two limbs of tubule

3. The differential permeability of different segments of nephron

4. Counter current flow in two limbs of Vasa recta

Which of the following is the correct way of writing the unit of osmolarity?

1. Mosmo/L

2. mOsmol/L

3. MOsmo/L

4. mOSMol/L

The gradient is mainly caused by

1. NaCl

2. Urea

3. Both A and B

4. Ammonia

The NaCl which is transported by the ascending limb of Henle's loop which is exchanged with the…….

1. Ascending limb of vasa recta

2. Descending limb of vasa recta

3. Ascending limb of LOH

4. Descending limb of LOH

NaCl is returned to the interstitium by

1. Ascending portion of LOH

2. Ascending portion of vasa recta

3. Descending portion of LOH

4. Descending portion of vasa recta

Urea will enter the

1. Thin segment of AL of LOH

2. Thick segment of AL of LOH

3. Descending Limb of LOH

4. All of these