The maximum amount of electrolytes and water $(70-80\ \%)$ from the glomerular filtrate is reabsorbed in which part of the nephron?

Active transport takes place in the absorption of

What is the duct of Bellini?

During urine formation,the tubular cells secrete substances like ........... into the filtrate.

Loop of Henle is found in

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.