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 Adaptive Immunity

Anatomy & Physiology

21. The Immune System

Introduction to Adaptive Immunity

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Multiple Choice

Which line of defense includes active immunity?

Fourth line of defense

First line of defense

Second line of defense

Third line of defense

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Verified step by step guidance

Understand the concept of the body's lines of defense: The immune system is structured in layers, each providing a different type of protection against pathogens.

First line of defense: This includes physical and chemical barriers such as skin and mucous membranes that prevent pathogens from entering the body.

Second line of defense: This involves non-specific immune responses like inflammation and phagocytosis, where white blood cells engulf and destroy invaders.

Third line of defense: This is where active immunity comes into play, involving specific immune responses. It includes the production of antibodies by B cells and the activation of T cells to target specific pathogens.

Active immunity is part of the third line of defense, characterized by the body's ability to remember and respond more effectively to pathogens it has encountered before, thanks to the adaptive immune system.