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

Introduction to the Digestive System

Anatomy & Physiology

23. The Digestive System

Introduction to the Digestive System

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Multiple Choice

The stomach is different from other digestive organs in that it:

secretes hydrochloric acid to aid in protein digestion

produces bile for fat emulsification

absorbs most nutrients into the bloodstream

is the primary site of water absorption

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Verified step by step guidance

Understand the primary functions of the stomach in the digestive system. The stomach is responsible for mechanical digestion (churning food) and chemical digestion, particularly of proteins.

Recall that the stomach secretes hydrochloric acid (HCl), which lowers the pH to create an acidic environment. This acidic environment activates pepsinogen into pepsin, an enzyme that breaks down proteins into smaller peptides.

Eliminate incorrect options by matching them to the functions of other digestive organs: bile production occurs in the liver, nutrient absorption primarily occurs in the small intestine, and water absorption is mainly a function of the large intestine.

Focus on the correct option: the stomach's unique role in secreting hydrochloric acid to aid in protein digestion distinguishes it from other digestive organs.

Conclude that the correct answer is related to the stomach's secretion of hydrochloric acid, which is essential for protein digestion and is not performed by other digestive organs.