For how much duration,food is stored in the stomach?

What is the function of bile salts?

Which of the following is the correct match for the given substrate,its site of action,the enzyme acting upon it,and its end product?

In the alimentary canal of man,$HCl$ provides acidic pH ($pH$ $1.8$) for the action of . . . . . . .

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.

Which part of the bile is useful in digestion?