The high threshold substances are

Select the $CORRECT$ statements:
$i$. Tubular secretion involves secretion of $H^{+}$ ions in $PCT$.
$ii$. Augmentation involves secretion of $H^{+}$ ions in $DCT$ and $CT$.
$iii$. Augmentation plays an important role in regulation of $pH$ of blood.
$iv$. Glomerular filtrate as well as urine are acidic.

The loop of Henle is located in the $.......$.

The proximal and distal convoluted tubules are parts of the:

What is the duct of Bellini?

In which segment of the nephron does the conditional reabsorption of $Na^+$ and water occur?