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

Introduction to the Immune System

Anatomy & Physiology

21. The Immune System

Introduction to the Immune System

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Multiple Choice

How are immune cells able to detect foreign pathogens?

By recognizing specific antigens on the surface of pathogens

By detecting the temperature of the surrounding environment

By identifying the color of the pathogen

By measuring the pH level of the blood

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Verified step by step guidance

Understand that immune cells are part of the body's defense system, designed to identify and eliminate foreign invaders such as bacteria, viruses, and other pathogens.

Learn that pathogens have unique molecules on their surfaces called antigens. These antigens are specific to each pathogen and serve as identifiers.

Recognize that immune cells, such as T-cells and B-cells, have receptors that can specifically bind to these antigens. This binding is crucial for the immune response.

Explore how the binding of an antigen to a receptor on an immune cell triggers a series of cellular responses, leading to the activation of the immune system to attack and destroy the pathogen.

Note that other options like detecting temperature, color, or pH are not mechanisms used by immune cells to identify pathogens. The primary method is through antigen recognition.