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

Why is an untreated acute allergic reaction a life-threatening situation?

It triggers a rapid increase in white blood cell production, overwhelming the circulatory system.

It causes the immune system to permanently shut down, leaving the body defenseless.

It results in the immediate destruction of all red blood cells, leading to anemia.

It can lead to anaphylaxis, causing severe respiratory distress and cardiovascular collapse.

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Verified step by step guidance

Understand that an acute allergic reaction can lead to anaphylaxis, a severe and potentially life-threatening condition.

Recognize that during anaphylaxis, the body releases a large amount of histamine and other chemicals, causing widespread inflammation.

Identify that this inflammation can lead to the constriction of airways, resulting in severe respiratory distress.

Acknowledge that anaphylaxis can also cause a sudden drop in blood pressure, leading to cardiovascular collapse.

Realize that without prompt treatment, such as the administration of epinephrine, anaphylaxis can quickly become fatal due to respiratory and circulatory failure.