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

21. The Immune System

Introduction to Innate Immunity

Anatomy & Physiology

21. The Immune System

Introduction to Innate Immunity

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Multiple Choice

Which of the following statements is correct about innate and adaptive immunity?

Innate immunity provides a specific response to pathogens, while adaptive immunity is non-specific.

Innate immunity requires prior exposure to a pathogen to be effective.

Adaptive immunity is the first line of defense against pathogens.

Adaptive immunity involves memory cells that provide a faster response upon re-exposure to the same pathogen.

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Verified step by step guidance

Understand the basic definitions: Innate immunity is the body's first line of defense and is non-specific, meaning it responds to pathogens in a general way. Adaptive immunity, on the other hand, is specific and involves a targeted response to particular pathogens.

Identify the characteristics of innate immunity: It does not require prior exposure to a pathogen to be effective and acts immediately or within hours of an antigen's appearance in the body.

Identify the characteristics of adaptive immunity: It involves the activation of lymphocytes and the production of antibodies specific to the pathogen. It also has a memory component, which allows for a faster and more efficient response upon re-exposure to the same pathogen.

Evaluate the statements given in the problem: The first statement is incorrect because innate immunity is non-specific, while adaptive immunity is specific. The second statement is incorrect because innate immunity does not require prior exposure. The third statement is incorrect because innate immunity is the first line of defense, not adaptive immunity.

Conclude with the correct statement: Adaptive immunity involves memory cells that provide a faster response upon re-exposure to the same pathogen, which is a key feature distinguishing it from innate immunity.