Optimum pH of saliva action is:

(1) 6.8

(2) 8.6

(3) 7

(4) 9.5

Pepsinogen is activated by:

(1) Trypsin

(2) Chymotrypsin

(3) HCl

(4) Na⁺

Pepsin converts:

(1) Protein into amino acid

(2) Fat into fatty acid

(3) Peptones into amino acid

(4) Proteins into proteoses and peptones (peptides)

Three secretions meeting the food in small intestine are:

(1) Bile, gastric juice and saliva

(2) Bile, pancreatic juice and gastric juice

(3) Pancreatic juice, intestinal juice and gastric juice

(4) Bile, pancreatic juice and succus entericus

Trypsinogen, chymotrypsinogen, procarboxypeptidase, amylase, lipase and nuclease enzymes are found in:

(1) Pancreatic juice

(2) Succus entericus / intestinal juice

(3) Gastric juice

(4) Bile and gastric juice

Bile produced in the liver is associated with which of the following?

(1) Emulsification of fats into tiny globules (micelles) in the small intestine by bile salts

(2) Digestive action of pancreatic amylase

(3) Emulsification of fats into tiny globules in the stomach

(4) Digestion of proteins into amino acids

Waves of muscle contraction that move the intestinal content are:

(1) Caused by-contraction of skeletal muscle

(2) Regulated by liver secretions

(3) Called peristalsis

(4) Voluntary

Bile aids in digestion and absorption of fats because it contains:

(1) Lipase

(2) Bile salts

(3) Bile pigments

(4) All of the above

Emulsification of fat is carried out by:

(1) Bile pigments

(2) Bile salts

(3) HCl

(4) Pancreatic juice

Aminopeptidase, a digestive enzyme produces:

(1) Tripeptidases

(2) Smaller peptides

(3) Peptones

(4) Amino acids