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

$A-$ About $30\%$ of starch is hydrolyzed by salivary amylase (optimum $pH\, 6.8$) in the buccal cavity.
$R-$ The saliva secreted into the oral cavity contains electrolytes $(Na^+, K^+, Cl^-, HCO_3^-)$ and enzymes,salivary amylase and lysozyme.

Select the incorrect option regarding the digestion and absorption of substances in different parts of the digestive system.

If the pancreas is removed,the compounds that remain undigested are

Go through the following statements regarding the physiology of digestion and identify whether they are true or false. Choose an appropriate option from the codes given below:
$I.$ Largest variety of hydrolases are present in omnivores,while the herbivores generally lack digestive enzymes.
$II.$ Digestive enzymes are of four types,namely,amylase,proteinases,lipases,and nucleases.
$III.$ Proteinases are also known as proteases,which are released in the active form because the proteins,either cellular or extracellular,are all hydrolysed by them in the absence of food.
$IV.$ Hydrolases and cholecystokinin are secreted by the exocrine part of the pancreas.

Match the following:

Column-$I$	Column-$II$
$(I)$ Chymotrypsin	$(a)$ Starch
$(II)$ Amylases	$(b)$ Monoglycerides
$(III)$ Nucleases	$(c)$ Dipeptides
$(IV)$ Lipases	$(d)$ Nucleosides