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

Which of the following statements concerning antigen-presenting cells is true?

Antigen-presenting cells do not interact with T cells.

Antigen-presenting cells are only found in the bloodstream.

Antigen-presenting cells include macrophages, dendritic cells, and B cells.

Antigen-presenting cells can directly destroy pathogens.

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Verified step by step guidance

Understand the role of antigen-presenting cells (APCs) in the immune system. APCs are crucial for initiating the immune response by processing and presenting antigens to T cells.

Recognize that APCs interact with T cells. This interaction is essential for the activation of T cells, which are a critical component of the adaptive immune response.

Identify the types of cells that function as APCs. These include macrophages, dendritic cells, and B cells, all of which can process and present antigens to T cells.

Consider the locations where APCs can be found. While they are present in the bloodstream, they are also located in various tissues throughout the body, especially in areas where pathogens are likely to enter.

Clarify the function of APCs in relation to pathogen destruction. APCs do not directly destroy pathogens; instead, they present antigens to T cells, which then coordinate the immune response to eliminate the pathogens.