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

Major Histocompatibility Complex Molecules

Anatomy & Physiology

21. The Immune System

Major Histocompatibility Complex Molecules

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Multiple Choice

What best describes the binding of the CD4 and CD8 co-receptors to MHC molecules?

Both CD4 and CD8 bind to MHC class II molecules.

CD4 binds to MHC class II molecules, while CD8 binds to MHC class I molecules.

CD4 binds to MHC class I molecules, while CD8 binds to MHC class II molecules.

Both CD4 and CD8 bind to MHC class I molecules.

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Verified step by step guidance

Understand the role of CD4 and CD8 co-receptors in the immune system. CD4 and CD8 are glycoproteins found on the surface of T cells, which are crucial for the immune response.

Recognize the difference between MHC class I and MHC class II molecules. MHC class I molecules are present on almost all nucleated cells and present endogenous antigens, while MHC class II molecules are found on antigen-presenting cells and present exogenous antigens.

Identify the specific binding interactions: CD4 co-receptors are primarily found on helper T cells and bind to MHC class II molecules, facilitating the activation of these T cells by antigen-presenting cells.

Understand that CD8 co-receptors are found on cytotoxic T cells and bind to MHC class I molecules, which is essential for the recognition and destruction of infected or cancerous cells.

Conclude that the correct description of the binding is: CD4 binds to MHC class II molecules, while CD8 binds to MHC class I molecules, reflecting their roles in the immune response.