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 of the following is not one of the functions of stomach acid?

Aids in the digestion of proteins

Activates pepsinogen to pepsin

Neutralizes alkaline substances

Kills bacteria and pathogens

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Verified step by step guidance

Understand the role of stomach acid: Stomach acid, primarily hydrochloric acid (HCl), plays a crucial role in digestion and protection against pathogens.

Identify the functions of stomach acid: It aids in protein digestion by denaturing proteins and activating the enzyme pepsinogen into pepsin, which further breaks down proteins.

Consider the protective role: Stomach acid helps kill bacteria and pathogens that enter the stomach, providing a defense mechanism against infections.

Analyze the options: The options provided include aiding in protein digestion, activating pepsinogen, neutralizing alkaline substances, and killing bacteria.

Determine the incorrect function: Stomach acid does not neutralize alkaline substances; instead, it creates an acidic environment. Therefore, the function 'Neutralizes alkaline substances' is not correct.