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 Complement System

Anatomy & Physiology

21. The Immune System

Introduction to the Complement System

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Multiple Choice

Which of the following statements about the complement system is incorrect?

The complement system is part of the innate immune response.

The complement system is activated only by antibodies.

The complement system can directly kill pathogens by forming a membrane attack complex.

Complement proteins are primarily produced by the liver.

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Verified step by step guidance

Understand the role of the complement system: The complement system is a part of the innate immune response, which means it acts as a first line of defense against pathogens.

Identify the activation mechanisms: The complement system can be activated through several pathways, including the classical pathway (which involves antibodies), the alternative pathway, and the lectin pathway. Therefore, it is not activated only by antibodies.

Explore the function of the complement system: One of the key functions of the complement system is to directly kill pathogens by forming a membrane attack complex (MAC), which creates pores in the pathogen's membrane, leading to cell lysis.

Recognize the source of complement proteins: Complement proteins are primarily produced by the liver, which is responsible for synthesizing many components of the immune system.

Evaluate the statements: Based on the understanding of the complement system, identify the incorrect statement. The statement 'The complement system is activated only by antibodies' is incorrect because the system can be activated by multiple pathways, not solely by antibodies.