Table of contents

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1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

23. The Digestive System

The Stomach

Anatomy & Physiology

23. The Digestive System

The Stomach

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Multiple Choice

In which part of the gastrointestinal tract is the enzyme pepsin active?

Large intestine

Esophagus

Small intestine

Stomach

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Verified step by step guidance

Understand the role of pepsin: Pepsin is an enzyme that breaks down proteins into smaller peptides. It is crucial for the digestion of dietary proteins.

Identify the environment where pepsin is active: Pepsin requires an acidic environment to function effectively. The stomach provides this environment with its gastric acid.

Recognize the location of pepsin secretion: Pepsin is secreted by the chief cells in the stomach lining as an inactive precursor called pepsinogen.

Learn about the activation process: Pepsinogen is converted into active pepsin when it comes into contact with hydrochloric acid in the stomach.

Conclude the location of pepsin activity: Given the acidic conditions and the secretion of pepsinogen, the stomach is the primary site where pepsin is active in the gastrointestinal tract.