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 the Immune System

Anatomy & Physiology

21. The Immune System

Introduction to the Immune System

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Multiple Choice

Which part of an antibody is responsible for binding to a specific antigen?

Fc region

Hinge region

Variable region

Constant region

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Verified step by step guidance

Understand the structure of an antibody: Antibodies are Y-shaped proteins composed of two heavy chains and two light chains. They have distinct regions, including the variable region, constant region, hinge region, and Fc region.

Learn the function of the variable region: The variable region is located at the tips of the Y-shaped antibody and is unique for each antibody. It contains specific amino acid sequences that form the antigen-binding site.

Recognize the role of antigen binding: The variable region is responsible for recognizing and binding to specific antigens. This specificity is due to the unique shape and chemical properties of the antigen-binding site.

Differentiate the other regions: The Fc region is involved in immune system signaling, the constant region provides structural stability, and the hinge region allows flexibility in the antibody structure. These regions do not directly bind to antigens.

Conclude that the variable region is the correct answer: Based on its structure and function, the variable region is responsible for binding to a specific antigen.