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

What is the difference between an epitope and an antigen?

An epitope is a specific part of an antigen that is recognized by the immune system, while an antigen is a substance that can provoke an immune response.

An antigen is a molecule that can provoke an immune response, while an epitope is a molecule that cannot be recognized by the immune system.

An antigen is a specific part of an epitope that is recognized by the immune system, while an epitope is a substance that can provoke an immune response.

An epitope is a type of antigen that can provoke an immune response, while an antigen is a specific part of an epitope recognized by the immune system.

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Verified step by step guidance

Understand the definition of an antigen: An antigen is any substance that can provoke an immune response in the body. It is typically a foreign molecule, such as a protein or polysaccharide, that is recognized by the immune system.

Understand the definition of an epitope: An epitope, also known as an antigenic determinant, is a specific part of an antigen that is recognized and bound by an antibody or a receptor on a T-cell. It is the precise molecular structure that the immune system identifies.

Differentiate between the two: While an antigen is the entire molecule that can trigger an immune response, an epitope is just a small, specific part of that antigen that is recognized by the immune system.

Consider the relationship: An antigen can have multiple epitopes, meaning that different antibodies or immune cells can recognize different parts of the same antigen.

Summarize the key difference: The main distinction is that an epitope is a specific region on an antigen that is recognized by the immune system, whereas an antigen is the whole molecule that can elicit an immune response.