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

Which type of leukocyte primarily functions as an antigen-presenting cell?

Eosinophil

Dendritic cell

Basophil

Neutrophil

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Verified step by step guidance

Understand the role of leukocytes (white blood cells) in the immune system. Leukocytes are responsible for defending the body against pathogens and include various types with specialized functions.

Learn the concept of antigen-presenting cells (APCs). APCs are immune cells that capture antigens, process them, and present them on their surface to T cells, initiating an adaptive immune response.

Identify the leukocyte types listed in the problem: Eosinophils, Basophils, Neutrophils, and Dendritic cells. Each has distinct functions in the immune system.

Recall that dendritic cells are the primary antigen-presenting cells. They are highly efficient at processing antigens and activating T cells, making them central to adaptive immunity.

Review the functions of the other leukocytes: Eosinophils combat parasitic infections, Basophils release histamine during allergic reactions, and Neutrophils are phagocytes that target bacteria and fungi. None of these primarily function as antigen-presenting cells.