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

What type of immunity uses helper cells and killer cells to identify and destroy abnormal cells?

Humoral immunity

Passive immunity

Cell-mediated immunity

Innate immunity

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Verified step by step guidance

Begin by understanding the different types of immunity: Humoral immunity involves antibodies produced by B cells, passive immunity is acquired through external sources like maternal antibodies, innate immunity is the body's first line of defense, and cell-mediated immunity involves T cells.

Focus on cell-mediated immunity, which is a type of adaptive immunity that does not involve antibodies but rather the activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen.

Identify the key components of cell-mediated immunity: Helper T cells (CD4+ cells) and cytotoxic T cells (CD8+ cells). Helper T cells assist other cells in the immune response, while cytotoxic T cells directly attack and destroy infected or abnormal cells.

Understand the role of helper T cells: They recognize antigens presented by antigen-presenting cells and release cytokines that stimulate the activity of other immune cells, including cytotoxic T cells.

Recognize the function of cytotoxic T cells: They identify and destroy cells that display abnormal antigens, such as virus-infected cells or cancer cells, by inducing apoptosis (programmed cell death).