_ is activated to_ by Enterokinase enzyme secreted by the lining of duodenum:
Correct answer: C. Trypsinogen, Trypsin
- A. Pepsinogen, Pepsin
- B. Pepsinogen, Trypsin
- C. Trypsinogen, Trypsin
- D. Chymotrypsinogen, Chymotrypsin
Explanation
The correct answer is Trypsinogen is activated to Trypsin by Enterokinase, which is an enzyme secreted by the lining of the duodenum. This activation is crucial for protein digestion as trypsin further activates other proteolytic enzymes, facilitating the breakdown of proteins. Pepsinogen to Pepsin conversion occurs in the stomach, activated by hydrochloric acid. Chymotrypsinogen is activated to Chymotrypsin by trypsin itself, not directly by Enterokinase.
This question appeared on the UHS MDCAT 2013 paper, which you can sit online with every answer explained.
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About Human Digestive System
The human digestive system breaks food into absorbable molecules through mechanical processing, enzyme action and chemical conditions along the alimentary canal. Questions cover the mouth, stomach, small and large intestines, liver, pancreas and associated secretions, including the digestion and absorption of carbohydrates, proteins, lipids, vitamins, minerals and water.
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