Table of contents

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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

Classes of Antibodies

Anatomy & Physiology

21. The Immune System

Classes of Antibodies

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Multiple Choice

Which antibody is the first class of antibody to be secreted in response to an antigen?

IgM

IgA

IgE

IgG

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Verified step by step guidance

Understand the role of antibodies in the immune response. Antibodies are proteins produced by B cells that help neutralize pathogens.

Learn about the different classes of antibodies: IgM, IgA, IgE, and IgG. Each class has distinct functions and characteristics.

Recognize that IgM is the first antibody produced in response to an antigen. It is primarily found in the blood and lymphatic fluid.

IgM is a pentamer, meaning it has five antibody units, which allows it to effectively bind to antigens and activate the complement system.

In the context of an initial immune response, IgM is crucial for early defense against infections, before other antibodies like IgG are produced in larger quantities.