Table of contents

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

Which component of gastric juice is most helpful in preventing the stomach from digesting itself?

Pepsin

Mucus

Hydrochloric acid

Intrinsic factor

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Verified step by step guidance

Understand the role of gastric juice components: Gastric juice contains several components, including pepsin, hydrochloric acid, mucus, and intrinsic factor, each serving different functions in digestion.

Identify the function of mucus: Mucus is a thick, protective layer that coats the stomach lining, preventing the stomach from digesting itself by providing a barrier against the harsh acidic environment.

Consider the role of hydrochloric acid: Hydrochloric acid creates an acidic environment necessary for pepsin activation and digestion of proteins, but it can also damage the stomach lining if not properly protected.

Evaluate the function of pepsin: Pepsin is an enzyme that breaks down proteins into peptides, but it can also digest the stomach lining if not shielded by mucus.

Recognize the importance of intrinsic factor: Intrinsic factor is crucial for vitamin B12 absorption but does not play a direct role in protecting the stomach lining from self-digestion.