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 Heart2h 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

21. The Immune System

Introduction to Innate Immunity

Anatomy & Physiology

21. The Immune System

Introduction to Innate Immunity

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Multiple Choice

A patient consumed food contaminated with pathogenic bacteria. However, the patient did not become ill. The doctor explained to the patient that the acidity of the patient’s stomach can kill many organisms, including bacteria. This type of protection would be classified as?

Adaptive immunity; which provides nonspecific immunity.

Adaptive immunity; which provides immunity against specific pathogens.

Innate immunity; which provides nonspecific immunity.

Innate immunity; which provides immunity against specific pathogens.

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Verified step by step guidance

Understand the two main types of immunity: innate and adaptive. Innate immunity is the body's first line of defense and provides nonspecific protection against pathogens. Adaptive immunity is more specific and involves the body's ability to recognize and remember specific pathogens.

Consider the role of stomach acidity in the immune response. The stomach's acidic environment is a nonspecific defense mechanism that can kill a wide range of pathogens, including bacteria, before they can cause harm.

Identify the characteristics of innate immunity. It includes physical barriers like skin and mucous membranes, chemical barriers like stomach acid, and cellular defenses like phagocytes. These defenses are always present and ready to respond to pathogens.

Differentiate between nonspecific and specific immunity. Nonspecific immunity, part of innate immunity, does not target specific pathogens but rather provides a general defense. Specific immunity, part of adaptive immunity, targets specific pathogens and involves memory cells.

Conclude that the protection provided by stomach acidity is an example of innate immunity, as it is a nonspecific defense mechanism that helps prevent infection by killing a broad range of pathogens.