State the function of saliva.

Increase in gastro-intestinal secretion and movement after ingestion of food is mainly brought about by

Select the correct option:
$(1)$ Yellowing of skin and eyes in jaundice is due to the accumulation of bile pigments $Bilirubin$ / $Biliverdin$.
$(2)$ The process of converting simple biological molecules into complex macromolecules is called $Digestion$ / $Assimilation$.

What would happen if our intestine harboured a microbial flora exactly similar to that found in the rumen of cattle?

Consider the following statements regarding digestion and absorption in mammals. Identify whether they are true or false and select the correct option accordingly.
$I.$ Both Kupffer's cells and Glisson's capsule are characteristics of the mammalian liver.
$II.$ In dentition,thecodont means that teeth are embedded in the socket of jaw bones.
$III.$ There are three pairs of salivary glands in human beings; out of them,the parotid,situated beneath the tongue,is the smallest salivary gland.
$IV.$ Zymogens (inactive forms of enzymes) are not the secretions of peptic cells.

Select the correct statement.