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

Cells of the Immune System: Granulocytes

Anatomy & Physiology

21. The Immune System

Cells of the Immune System: Granulocytes

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Multiple Choice

Which of the following cells can engulf a pathogen?

Erythrocytes

T cells

B cells

Macrophages

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Verified step by step guidance

Understand the role of macrophages in the immune system. Macrophages are a type of white blood cell that play a crucial role in the body's defense mechanism by engulfing and digesting pathogens and cellular debris.

Recognize the process of phagocytosis. Macrophages use phagocytosis to engulf pathogens. This involves the macrophage surrounding the pathogen with its cell membrane and forming a vesicle known as a phagosome.

Differentiate between the types of cells listed. Erythrocytes are red blood cells responsible for carrying oxygen, not for engulfing pathogens. T cells and B cells are lymphocytes involved in adaptive immunity, but they do not engulf pathogens directly.

Identify the function of T cells and B cells. T cells help regulate immune responses and can kill infected cells, while B cells produce antibodies to neutralize pathogens. Neither performs phagocytosis.

Conclude that macrophages are the correct answer. They are specialized for engulfing and digesting pathogens, unlike erythrocytes, T cells, and B cells.