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

What is the primary difference between innate and acquired immunity?

Innate immunity is slower to respond than acquired immunity.

Innate immunity requires prior exposure to a pathogen, while acquired immunity does not.

Innate immunity is only active during childhood, whereas acquired immunity is lifelong.

Innate immunity provides a non-specific defense against pathogens, while acquired immunity targets specific pathogens.

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Verified step by step guidance

Understand the concept of immunity: Immunity is the body's ability to resist or eliminate potentially harmful foreign materials or abnormal cells.

Define innate immunity: Innate immunity is the body's first line of defense, providing a non-specific response to pathogens. It includes physical barriers like skin, chemical barriers like stomach acid, and immune cells like phagocytes.

Define acquired immunity: Acquired immunity, also known as adaptive immunity, develops as a response to exposure to specific pathogens. It involves the activation of lymphocytes (B cells and T cells) and the production of antibodies.

Compare the speed of response: Innate immunity responds quickly to pathogens, often within hours, whereas acquired immunity takes longer to develop, typically days, as it requires the recognition and targeting of specific antigens.

Highlight the specificity: The primary difference is that innate immunity provides a non-specific defense against pathogens, meaning it does not distinguish between different types of pathogens, while acquired immunity targets specific pathogens, adapting to recognize and remember them for faster response upon future exposure.