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 Heart2h 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

2. Cell Chemistry & Cell Components

Endocytosis and Exocytosis

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Endocytosis and Exocytosis

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Multiple Choice

Which of the following pairs correctly matches a membrane transport process to its primary function?

Phagocytosis: secretion of large particles from the cell by fusion of vesicles with the plasma membrane

Exocytosis: the movement of water and solutes out of the cell by passage through the plasma membrane

Osmosis: passive diffusion of water and small solutes across a membrane

None of the listed responses is correct.

Pinocytosis: the uptake of water and small solutes into the cell by formation of vesicles at the plasma membrane

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Verified step by step guidance

Understand the concept of membrane transport processes. Membrane transport processes are mechanisms by which substances move across the cell membrane. They can be active or passive, depending on whether they require energy.

Review the definition of phagocytosis. Phagocytosis is a type of endocytosis where large particles, such as bacteria or dead cells, are engulfed by the cell. It involves the formation of vesicles but is not primarily for secretion.

Examine the process of exocytosis. Exocytosis is the process by which cells expel materials. Vesicles containing substances fuse with the plasma membrane to release their contents outside the cell. It does not involve the movement of water and solutes out of the cell.

Clarify the concept of osmosis. Osmosis is the passive diffusion of water across a semipermeable membrane. It does not involve solutes, only water, moving from an area of low solute concentration to high solute concentration.

Identify the correct function of pinocytosis. Pinocytosis is a form of endocytosis where the cell ingests extracellular fluid and small solutes by forming vesicles. This process is correctly described as the uptake of water and small solutes into the cell.