Question

Enterokinase is present in the
A. Bile juice
B. Intestinal juice
C. Pancreatic juice
D. Pancreatic hormone

Answer 1

Hint: In the membrane lining of the duodenum, Enterokinase is thought to be formed by the glands of Brunner. It resists the degradation of numerous enzymes in the small intestine, but in the large intestine, it is killed by bacteria.

Complete Answer:
Enterokinase, also known as enteropeptidase, is a proteolytic enzyme produced from the duodenal mucosa that converts the trypsinogen inactive pancreatic secretion into trypsin, one of several enzymes which digest protein.

- Bile is an unpleasant-tasting, darker green to pale yellow brown liquid secreted by the liver, deposited in the gall bladder and released into the duodenum when ingested. The gall bladder 's primary purpose is to act as a bile storage tank. Thus, option A is not the correct option.

- Intestinal juice is a clear to pale yellow intestinal juice, watery discharge consisting of hormones, mucus, digestive enzymes, and neutralising substances discharged from the lining of the large and small intestines by the glands and mucous membranes. Thus, option B is not the correct option.

- Following the entrance of swallowed food from the intestine, Enterokinase is an enzyme produced from intestinal glands. Trypsinogen (zymogen) is converted into active state, trypsin, leading in the eventual release of digestive pancreatic enzymes.

- The pancreas is an endocrine and exocrine gland. Following a meal, the exocrine component secretes pancreatic fluid into duodenum. The endocrine section secretes different hormone types. These are formed in the pancreas by a specialised tissue and then discharged into the capillary system via the portal venous circulation to the liver. Thus, option D is not the correct option.

Thus, the correct answer is option (C) Pancreatic juice.

Note: Inactive procarboxypeptidase can be transformed into the active enzyme carboxypeptidase by Enterokinase. With poor growth and production, Enterokinase deficiency induces extreme protein malabsorption.