The amount of the original filtrate volume which is reabsorbed by the time the tubular fluid enters the Henle's loop is approximately (in $\%$)

Explain the function of collecting tubules.

Components reabsorbed by passive transport - $P$
Components reabsorbed by active transport - $Q$
$I - Na^+$,$II$ - Glucose,$III$ - Nitrogenous wastes,$IV$ - Amino acids,$V$ - Water
Select the correct option for $P$ and $Q$.
$P \quad \quad Q$

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

In which part of the nephron are all essential nutrients and $70-80 \%$ of electrolytes and water reabsorbed?

The Loop of Henle is found in the ........