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

Introduction to the Digestive System

Anatomy & Physiology

23. The Digestive System

Introduction to the Digestive System

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Multiple Choice

What is the inactive precursor of pepsin in the digestive system?

Trypsinogen

Chymotrypsinogen

Pepsinogen

Procarboxypeptidase

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Verified step by step guidance

Understand that pepsin is an enzyme involved in the digestive process, specifically in breaking down proteins in the stomach.

Recognize that many digestive enzymes are secreted in an inactive form to prevent them from digesting the tissues of the organs that produce them.

Identify that the inactive form of pepsin is called pepsinogen. This is a zymogen, which is an inactive precursor of an enzyme.

Learn that pepsinogen is secreted by the chief cells in the stomach lining and is activated to pepsin when it comes into contact with hydrochloric acid in the stomach.

Differentiate pepsinogen from other zymogens like trypsinogen, chymotrypsinogen, and procarboxypeptidase, which are precursors to other digestive enzymes.