Table of contents

1. Introduction to Anatomy & Physiology5h 40m
2. Cell Chemistry & Cell Components12h 37m
3. Energy & Cell Processes10h 7m
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 Blood1h 22m
18. The Heart1h 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 Balance Coming soon
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity Coming soon

21. The Immune System

Physical Barriers in First-Line Defenses: Mucous Membrane

Anatomy & Physiology

21. The Immune System

Physical Barriers in First-Line Defenses: Mucous Membrane

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Multiple Choice

Which of the following is/are NOT an innate defense mechanism of the body?

fever

B lymphocytes

inflammation

skin

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Verified step by step guidance

Begin by understanding the concept of innate defense mechanisms. These are the body's first line of defense against pathogens and are non-specific, meaning they do not target specific pathogens.

Identify the options given: fever, B lymphocytes, inflammation, and skin. Consider which of these are part of the innate immune system.

Recall that fever is a systemic response that helps to inhibit pathogen growth and is part of the innate immune system.

Understand that inflammation is a localized response to injury or infection, characterized by redness, heat, swelling, and pain, and is also part of the innate immune system.

Recognize that skin acts as a physical barrier to prevent pathogen entry, making it an innate defense mechanism. B lymphocytes, however, are part of the adaptive immune system, which targets specific pathogens, and thus are not an innate defense mechanism.

2:36m