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

A nursing infant is able to obtain disease-fighting antibodies, which are large protein molecules, from its mother's milk. These molecules probably enter the cells lining the baby's digestive tract via which process?

Osmosis

Passive transport

Exocytosis

Active transport

Endocytosis

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Verified step by step guidance

Understand the concept of endocytosis: Endocytosis is a cellular process in which substances are brought into the cell. It involves the engulfing of external materials by the cell membrane, forming a vesicle that transports the material inside the cell.

Recognize the role of antibodies: Antibodies are large protein molecules that play a crucial role in the immune system by identifying and neutralizing pathogens such as bacteria and viruses.

Identify the mechanism for large molecules: Large molecules like antibodies cannot pass through the cell membrane via simple diffusion or osmosis due to their size. Instead, they require a specialized process to be transported into cells.

Differentiate between transport processes: Passive transport and osmosis involve the movement of substances across the cell membrane without energy input, typically for small molecules. Active transport requires energy to move substances against a concentration gradient, but is not typically used for large molecules like antibodies.

Conclude with the appropriate process: Endocytosis is the process by which large molecules, such as antibodies from mother's milk, are taken into the cells lining the baby's digestive tract. This allows the infant to obtain disease-fighting antibodies effectively.