Question

Crypts of Lieberkuhn are present in
A. Pancreas and secrete pancreatic juice
B. Small intestine and secrete digestive enzymes
C. Stomach and excrete dilute HCI
D. Stomach and secrete trypsin

Answer 1

Intestinal glands are tubular glands that are present between the finger-like projections of the inner surface of the small intestine also considered as the epithelium of the small intestine. These epithelium are also known as Crypts of Lieberkuhn These epithelium produce the intestinal mucus that contains the digestive enzymes for instance-peptidase, sucrase, maltase, lactase and intestinal lipase.

Complete answer:

Option A.Pancreatic juice is a liquid secreted by the pancreas in our body. It contains various types of enzymes, such as trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, pancreatic lipase, nucleases as well as amylase. Pancreatic juice is alkaline in its nature because of the high concentration of bicarbonate ions.

Option B. The pancreas along with gland cells of the small intestine are considered as secret digestive enzymes that proceed the process of chemically breaking down complex food molecules into simpler ones.

Option C. The main constituent of gastric acid is hydrochloric acid which is produced by parietal cells in the gastric glands in our stomach. Its secretion is a complex as well as relatively energetically expensive process.

Option D. Trypsin is one of the best characterized serine proteinases in the cells of the pancreas, it secreted into the duodenum, and further activated into the mature form of trypsin by enterokinase, along with functions as an essential food-digestive enzyme.

Hence, the correct answer is option (B).

Note: Folds of small intestine are in a conical shaped villi. There is a Small slit-like space at the base of the villi. These spaces are known as crypts of Lieberkuhn. The crypts of Lieberkuhn secrete intestinal juice. The intestinal juice mainly contains 99% of water and 1% of other digestive enzymes.