Answer: Enterokinase, an enzyme produced by the intestinal mucosa.
- A Pepsin carried over from the stomach into the duodenum
- B Hydrochloric acid secreted by gastric parietal cells
- C Enterokinase, an enzyme produced by the intestinal mucosa
- D Bile salts released from the gall bladder
Correct answer: C. Enterokinase, an enzyme produced by the intestinal mucosa
Explanation: Enterokinase, secreted by the duodenal mucosa, cleaves trypsinogen into active trypsin, which then activates other pancreatic zymogens in a cascade.
The human digestive system. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
The digestive tract, digestive enzymes, hormonal control of digestion, and liver function. High NEET weightage.