Acidogenesis is:

In the renal tubule,the reabsorption of chloride ions from the glomerular filtrate occurs by:

Which of the following is the $CORRECT$ match?

Components reabsorbed by the Proximal Convoluted Tubule $(PCT)$ - $P$
Components secreted by the Proximal Convoluted Tubule $(PCT)$ - $Q$
$I - K^{+}$,$II - \text{Ammonia}$,$III - HCO_{3}^{-}$,$IV - \text{Essential nutrients}$,$V - 70$ to $80\%$ $\text{electrolytes and water}$,$VI - H^{+}$
Select the correct option for $P$ and $Q$.
$P \quad\quad\quad Q$

$PCT$ helps in the maintenance of $pH$ in the body fluid by

The portion of the nephron which is relatively impermeable to water is: