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 of the following types of proteins are synthesized by the rough ER?

Secretory proteins

Mitochondrial proteins

Nuclear proteins

Cytosolic proteins

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Verified step by step guidance

Understand the function of the rough endoplasmic reticulum (ER). The rough ER is studded with ribosomes, which are the sites of protein synthesis. It is primarily involved in the synthesis of proteins that are either secreted from the cell, incorporated into the cell's plasma membrane, or sent to an organelle.

Identify the types of proteins synthesized by the rough ER. Secretory proteins are synthesized by the rough ER. These proteins are destined to be secreted out of the cell or sent to the cell membrane.

Consider the location and function of mitochondrial, nuclear, and cytosolic proteins. Mitochondrial proteins are typically synthesized in the cytosol and imported into the mitochondria. Nuclear proteins are also synthesized in the cytosol and imported into the nucleus. Cytosolic proteins are synthesized in the cytosol and remain there.

Compare the synthesis locations of these proteins. Secretory proteins are synthesized by the rough ER, while mitochondrial, nuclear, and cytosolic proteins are synthesized in the cytosol.

Conclude that the rough ER is responsible for synthesizing secretory proteins, as these are the proteins that require processing and transport through the ER and Golgi apparatus before being secreted or incorporated into the cell membrane.