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

2. Cell Chemistry & Cell Components

Endomembrane System: Protein Secretion

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Endomembrane System: Protein Secretion

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Multiple Choice

Which statement best describes the process of protein secretion in the endomembrane system?

Proteins are synthesized in the cytoplasm and directly secreted through the plasma membrane.

Proteins are synthesized in the rough endoplasmic reticulum, processed in the Golgi apparatus, and then transported in vesicles to the plasma membrane for secretion.

Proteins are synthesized in the nucleus and transported directly to the plasma membrane for secretion.

Proteins are synthesized in the smooth endoplasmic reticulum and secreted through lysosomes.

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Verified step by step guidance

Understand that the endomembrane system is a group of membranes and organelles in eukaryotic cells that work together to modify, package, and transport lipids and proteins.

Recognize that protein synthesis begins in the rough endoplasmic reticulum (RER), where ribosomes are attached, giving it a 'rough' appearance. This is where proteins are synthesized and initially modified.

After synthesis in the RER, proteins are transported to the Golgi apparatus. Here, they undergo further modifications, such as glycosylation, which is the addition of sugar molecules.

Once processed, proteins are packaged into vesicles that bud off from the Golgi apparatus. These vesicles transport the proteins to their next destination.

Finally, the vesicles fuse with the plasma membrane, releasing the proteins outside the cell in a process known as exocytosis, completing the secretion process.