The sweat glands in mammals are primarily concerned with

Tears are .....

The most important function of perspiration is to

Which of the following pairs is correctly matched regarding the secretion and its primary physiological role in humans?

Components present in sweat $- P$
Components present in sebum $- Q$
$I -$ Sterols,$II -$ Waxes,$III - NaCl$,$IV -$ Hydrocarbons,
$V -$ Lactic acid,$VI -$ Small amounts of urea
Select the correct option for $P$ and $Q$.
$P \quad Q$

Kidneys are not the only organs of excretion; their work is supplemented by