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 Inflammation

Anatomy & Physiology

21. The Immune System

Introduction to Inflammation

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Multiple Choice

Which of the following would be a sign of an infection?

Increased energy levels

Pale skin

Redness and swelling

Decreased body temperature

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Verified step by step guidance

Understand the context of the problem: The question is asking for signs of an infection, which are physiological responses of the body to pathogens.

Identify common signs of infection: Infections often lead to inflammation, which is characterized by redness, swelling, heat, and pain.

Analyze each option: Increased energy levels are not typically associated with infection. Pale skin might indicate anemia or poor circulation, not infection. Decreased body temperature is not a common sign of infection; fever is more typical.

Focus on the correct answer: Redness and swelling are classic signs of inflammation, which is a common response to infection as the body attempts to fight off pathogens.

Conclude with the reasoning: Redness and swelling occur due to increased blood flow and immune activity in the affected area, which are direct responses to infection.