Question

Correct the following statements by deleting one of the entries (given in bold).

a. Goblet cells are located in the intestinal mucosal epithelium and secrete chymotrypsin/ mucus.

b. Fats are broken down into di- and monoglycerides with the help of amylase/ lipases.

c. Gastric glands of stomach mucosa have oxyntic cell/chief cells which secrete HCl.

d. Saliva contains enzymes that digest starch/ protein.

Answer 1

a. Goblet cells:

Goblet cell, a unicellular gland, is present in the intestinal mucosa as well as in the mucosa of the stomach (part of gastric glands). The mucus secreted by the cells helps in lubrication.

Chymotrypsin:

Chymotrypsinogen is secreted by pancreas which gets activated in the duodenum.

Final answer:

Goblet cells are located in the intestinal mucosal epithelium and secrete mucus.

b. Lipases:

Pancreatic and intestinal lipase are found in the pancreatic juice and succus entericus respectively.
The pancreatic juice hydrolyses fats into di- and mono-glycerides and the intestinal lipase breaks the monoglycerides down into glycerol and fatty acids.

Amylases:

Amylases are enzymes that break down carbohydrates.

Final answer:

Fats are broken down into di- and monoglycerides with the help of lipases.

c. Oxyntic cells:

Oxyntic cells or parietal cells secrete $HCl$ and an intrinsic factor that helps in the absorption of vitamin $B_{12}$.

Chief cells:
Chief cells of the gastric glands of the stomach mucosa secrete pepsinogen.

Final answer

Gastric glands of the stomach have oxyntic cells which secrete HCl.

d. Salivary amylase:

Saliva contains salivary amylase that digests starch. Protein digestion starts in the stomach.

Protein digestion:

Protein digestion is carried about by proteolytic enzymes which are secreted by stomach, pancreas and small intestine.

Final answer:

Saliva contains enzymes that digest starch.