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 T Lymphocytes

Anatomy & Physiology

21. The Immune System

Introduction to T Lymphocytes

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Multiple Choice

What type of T cell is responsible for seeking out and destroying abnormal or infected cells?

Memory T cells

Helper T cells

Regulatory T cells

Cytotoxic T cells

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Verified step by step guidance

Understand the role of T cells in the immune system. T cells are a type of lymphocyte that play a central role in cell-mediated immunity.

Identify the different types of T cells and their functions: Memory T cells help in recognizing previously encountered antigens, Helper T cells assist other cells in the immune response, Regulatory T cells help maintain tolerance to self-antigens and prevent autoimmune disease.

Focus on Cytotoxic T cells, which are specifically responsible for seeking out and destroying abnormal or infected cells. They are crucial in the defense against intracellular pathogens such as viruses and some bacteria.

Cytotoxic T cells recognize infected or abnormal cells by detecting specific antigens presented on the surface of these cells. They use receptors to bind to these antigens.

Once bound, Cytotoxic T cells release substances like perforin and granzymes that lead to the destruction of the target cell, effectively eliminating the threat.