Enzymes Pepsin and Trypsin

Explanation:
Pepsin and trypsin are two important enzymes involved in the process of digestion. They play a crucial role in breaking down proteins into smaller peptides and amino acids, which can be easily absorbed by the body. Let's understand where these enzymes are secreted from.

Pepsin:
Pepsin is primarily secreted by the stomach. The stomach is an organ located in the upper abdomen that serves as a food reservoir and plays a vital role in the digestion of food. The stomach lining contains specialized cells called chief cells, which produce and secrete pepsinogen. Pepsinogen is an inactive form of pepsin.

When food enters the stomach, the highly acidic environment triggers the conversion of pepsinogen into its active form, pepsin. Pepsin is an enzyme that specifically acts on proteins, breaking them down into smaller peptides. It works optimally in the acidic pH of the stomach.

Trypsin:
Trypsin is an enzyme that is secreted by the pancreas. The pancreas is a glandular organ located behind the stomach. It performs both exocrine and endocrine functions. The exocrine function involves the secretion of digestive enzymes, including trypsin, into the pancreatic duct.

Trypsinogen is the inactive form of trypsin, which is secreted by the pancreas. When food enters the small intestine, a hormone called enterokinase is released. Enterokinase activates trypsinogen into its active form, trypsin. Trypsin then acts on proteins, breaking them down into smaller peptides.

Conclusion:
In summary, pepsin is secreted by the stomach, while trypsin is secreted by the pancreas. They both play a crucial role in the breakdown of proteins during the process of digestion.