The part of nephron involved in active reabsorption of sodium is:
1. distal convoluted tubule
2. proximal convoluted tubule
3. Bowman's capsule
4. descending limb of Henle's loop
Which one of the following statement with regards to the excretion by the human kidneys is correct?
1. | Descending limb of Loop of Henle is impermeable to water |
2. | Distal convoluted tubule is incapable of reabsorbing HCO3 |
3. | Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules |
4. | Ascending limb of Loop of Henle is impermeable to electrolytes |