Question

Ptyalin is an enzyme of
A. Salivary juice
B. Pancreatic juice
C. Intestinal juice
D. None of the above

Answer 1

Hint: The food we eat is in a complex form our digestive system helps in breaking down the food into a simpler form with the help of an enzyme. In the digestion process, many enzymes involved salivary enzymes, pepsin, trypsin, and some other enzymes.

Complete answer:
Ptyalin is an enzyme produced by the salivary gland. Ptyalin is a type of salivary amylase. It acts on starch and reduces starch into sugar. Ptyalin is an alpha salivary amylase. Humans have four salivary glands.
Pancreatic juice: Pancreatic juice produced by the pancreatic duct. Pancreatic juice contains inactive enzymes trypsinogen, chymotrypsinogen, lipases, and amylases. Amylase produced by the pancreatic cell is different from alpha amylase(Ptyalin).
Intestinal juice: These juices contain a variety of enzymes like disaccharides, dipeptides, lipase.
Hence, ptyalin is an enzyme of salivary juice
So, the correct option is (A).

Additional information:
The four salivary gland present in human are:
Parotid gland: Humans have two parotid glands. It is the largest salivary gland. It secretes saliva and alpha salivary amylase.
Submandibular gland: It is a pair of glands present in the lower jaw. It produces mucus and saliva. It produces more saliva in the parotid gland.
Sublingual gland: It is present below the tongue and front of the submandibular glands. It mainly secretes mucus.
Minor salivary gland: In the mouth and digestive there are thousands of small salivary glands.

Note: Lysozyme also present in saliva acts as an antibacterial agent that prevents infection
Thirty percent of starch is converted into carbohydrates in the mouth by the salivary amylase. Salivary amylase activates at a pH of 6.8.