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

What is the most abundant immunoglobulin in the blood?

IgA

IgM

IgG

IgE

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Verified step by step guidance

Understand the role of immunoglobulins: Immunoglobulins, or antibodies, are proteins produced by the immune system to identify and neutralize foreign objects like bacteria and viruses.

Identify the types of immunoglobulins: The main classes of immunoglobulins are IgA, IgD, IgE, IgG, and IgM, each with distinct roles and locations in the body.

Focus on IgG: IgG is the most abundant immunoglobulin in the blood, accounting for about 75-80% of all antibodies. It plays a crucial role in the body's defense against bacterial and viral infections.

Compare with other immunoglobulins: IgA is mainly found in mucous membranes, IgM is the first antibody produced in response to an infection, and IgE is involved in allergic reactions.

Conclude with the correct answer: Based on the information, IgG is the most abundant immunoglobulin in the blood, making it the correct answer to the problem.