Question

The enzyme pepsin is secreted by

• A. Inner lining of oesophagus
• B. Gastric lining of stomach
• C. Inner lining of duedenum
• D. Gall bladder

Answer 1

Answer: (B)

Gastric lining of stomach

• Pepsin is an endopeptidase that breaks down proteins into smaller peptides by enzyme protease.
• Pepsin's proenzyme, pepsinogen, is released by the chief cells in the stomach wall, and upon mixing with the hydrochloric acid of the gastric juice, pepsinogen activates to become pepsin.
• It is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest the proteins in food. Hence, The enzyme pepsin is secreted by the gastric lining of the stomach.

So, the correct answer is 'gastric lining of stomach'.