Why Pancreatic Enzymes Are Activated in the Small Intestine

Pancreatic enzymes are produced as inactive zymogens to protect the pancreas and surrounding organs from self-digestion.

Mechanism

1. When food enters the small intestine, hormones (secretin, cholecystokinin) signal the pancreas to release pancreatic juice.
2. The juice contains enzymes in their active forms, which then digest carbohydrates, proteins, and fats.

Why Inactivation Matters

If enzymes were active in the pancreas, they would digest pancreatic tissue and nearby organs (liver, stomach), causing severe damage. Producing them as zymogens ensures they only become active after reaching the small intestine.