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

Which proteins on the antigen-presenting cell are recognized by the helper T-cell?

MHC Class I molecules

CD8 molecules

B-cell receptors

MHC Class II molecules

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Verified step by step guidance

Understand the role of antigen-presenting cells (APCs) in the immune system. APCs are responsible for displaying antigens to T-cells, which is crucial for initiating an immune response.

Recognize the types of major histocompatibility complex (MHC) molecules. MHC molecules are proteins on the surface of cells that present antigen fragments to T-cells. There are two main classes: MHC Class I and MHC Class II.

Identify the specific interaction between helper T-cells and MHC molecules. Helper T-cells, also known as CD4+ T-cells, specifically recognize antigens presented by MHC Class II molecules on APCs.

Differentiate between the roles of CD8 molecules and CD4 molecules. CD8 molecules are found on cytotoxic T-cells and interact with MHC Class I molecules, whereas CD4 molecules are found on helper T-cells and interact with MHC Class II molecules.

Conclude that the proteins recognized by helper T-cells on antigen-presenting cells are MHC Class II molecules, which are essential for the activation of these T-cells in the immune response.