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 antigen do T lymphocytes not recognize?

Free-floating antigens in the bloodstream

Antigens presented by macrophages

Antigens presented by dendritic cells

Peptide antigens presented by MHC molecules

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Verified step by step guidance

Understand the role of T lymphocytes: T lymphocytes, or T cells, are a type of white blood cell that play a crucial role in the immune response. They are primarily involved in recognizing and responding to antigens presented by other cells.

Learn about antigen presentation: Antigens are substances that can induce an immune response. T cells do not recognize free-floating antigens; instead, they recognize antigens that are presented by other cells through specific molecules.

Explore the role of MHC molecules: Major Histocompatibility Complex (MHC) molecules are proteins found on the surface of cells that present peptide antigens to T cells. T cells recognize these peptide antigens when they are bound to MHC molecules.

Identify the cells involved in antigen presentation: Macrophages and dendritic cells are types of antigen-presenting cells (APCs) that process and present antigens to T cells using MHC molecules.

Conclude which antigens T cells do not recognize: Since T cells require antigens to be presented by MHC molecules on the surface of APCs, they do not recognize free-floating antigens in the bloodstream.