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

Antigens

Anatomy & Physiology

21. The Immune System

Antigens

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Multiple Choice

An antigen binds to an antibody at which of the following locations?

Hinge region

Fc 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 that play a crucial role in the immune response. They consist of two main regions: the variable region and the constant region.

Learn about the variable region: The variable region is located at the tips of the 'Y' shape of the antibody. This region is responsible for binding to antigens due to its unique structure that can adapt to different shapes of antigens.

Explore the constant region: The constant region forms the base of the 'Y' shape and is responsible for effector functions, such as recruiting other parts of the immune system. It does not bind to antigens.

Differentiate between the hinge and Fc regions: The hinge region provides flexibility to the antibody, allowing it to bind to antigens more effectively. The Fc region is part of the constant region and interacts with cell receptors and complement proteins.

Conclude with the antigen-antibody interaction: Antigens bind specifically to the variable region of the antibody, which is tailored to recognize and attach to specific antigens, ensuring a precise immune response.