The contraction of the digestive tract is known as ...... .

The epithelial cells involved in the absorption of food in the intestine have . . . . . . on their surface.

Fat digestion is facilitated by

The primary function of bile is:

Bile helps in

Select the correct option for $Amylase$.
$I-$ Acts in the oral cavity at $pH$ $6.8$.
$II-$ Acts in the small intestine at $pH$ $7.8$.
$III-$ Converts polysaccharides into monosaccharides.
$IV-$ $Amylase$ is a hydrolytic enzyme.
$V-$ $Amylase$ also acts as an antibacterial agent.