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

Phagocytosis

Anatomy & Physiology

21. The Immune System

Phagocytosis

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Multiple Choice

Which statement best describes phagocytosis?

Phagocytosis is the process of cells releasing substances into the extracellular space.

Phagocytosis is the mechanism by which cells produce energy in the form of ATP.

Phagocytosis involves the passive transport of small molecules across the cell membrane.

Phagocytosis is the process by which cells engulf and digest large particles or pathogens.

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Verified step by step guidance

Understand the term 'phagocytosis': It is a cellular process where cells, often immune cells like macrophages, engulf and digest large particles, such as bacteria or dead cells.

Differentiate phagocytosis from other cellular processes: Unlike exocytosis, which involves releasing substances, phagocytosis involves taking substances into the cell.

Recognize that phagocytosis is an active process: It requires energy to engulf particles, distinguishing it from passive transport, which does not require energy.

Identify the role of phagocytosis in the immune system: It is crucial for defending the body against pathogens by engulfing and breaking them down.

Conclude that the correct description of phagocytosis is the process by which cells engulf and digest large particles or pathogens, as it aligns with the function and mechanism of this cellular process.