Which of the following substances is totally reabsorbed through renal tubules?

The substance which is completely reabsorbed from the filtrate in the renal tubule under normal conditions is

What percentage of the filtrate formed per day is reabsorbed by the renal tubules?

The capillary network running parallel to the $Henle's$ loop is called the ......

Given below are two statements:
Statement $I$: In the nephron,the descending limb of the 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.
In the light of the above statements,choose the correct answer from the options given below:

Reabsorption of useful substances back into the blood from the filtrate in a nephron occurs in