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

Cytotoxic T cells will bind with their T-cell receptor (TCR) to which of the following?

Free-floating antigens in the bloodstream

MHC class I molecules presenting antigen

B-cell receptors on B lymphocytes

MHC class II molecules presenting antigen

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Verified step by step guidance

Understand the role of cytotoxic T cells: Cytotoxic T cells are a type of immune cell that play a crucial role in the body's defense against infected or cancerous cells. They are part of the adaptive immune system and are responsible for directly killing cells that display foreign antigens.

Learn about T-cell receptors (TCRs): TCRs are molecules found on the surface of T cells, including cytotoxic T cells. They are responsible for recognizing antigens presented by other cells. The specificity of TCRs allows T cells to identify and bind to specific antigens.

Explore the concept of MHC molecules: Major Histocompatibility Complex (MHC) molecules are proteins found on the surface of cells that present antigens to T cells. There are two main classes: MHC class I and MHC class II. MHC class I molecules are present on almost all nucleated cells and present endogenous antigens, typically from viruses or intracellular pathogens.

Identify the interaction between cytotoxic T cells and MHC class I molecules: Cytotoxic T cells specifically bind to antigens presented by MHC class I molecules. This interaction is crucial for the immune response against infected or abnormal cells, as it allows cytotoxic T cells to recognize and destroy these cells.

Clarify why cytotoxic T cells do not bind to other options: Cytotoxic T cells do not bind to free-floating antigens in the bloodstream, B-cell receptors on B lymphocytes, or MHC class II molecules presenting antigen. These interactions are not part of the cytotoxic T cell's function, which is focused on recognizing antigens presented by MHC class I molecules.