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 Innate Immunity

Anatomy & Physiology

21. The Immune System

Introduction to Innate Immunity

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Multiple Choice

What is true regarding the body's defense mechanisms in the immune system?

The innate immune system is responsible for producing antibodies.

The innate immune system provides a non-specific defense against pathogens.

The adaptive immune system is the first line of defense against infections.

The adaptive immune system responds immediately to all pathogens.

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Verified step by step guidance

Understand the two main components of the immune system: the innate immune system and the adaptive immune system.

The innate immune system provides a non-specific defense mechanism. It acts as the first line of defense and includes physical barriers like skin, chemical barriers like stomach acid, and cells like phagocytes that attack invaders indiscriminately.

The adaptive immune system provides a specific defense mechanism. It involves lymphocytes such as B cells and T cells, which recognize specific antigens and produce antibodies tailored to those antigens.

Recognize that the innate immune system does not produce antibodies; this is a function of the adaptive immune system.

The adaptive immune system is not the first line of defense and does not respond immediately. It takes time to recognize specific pathogens and mount a targeted response.