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

What is the primary functional difference between the smooth and rough endoplasmic reticulum (ER) in the context of protein secretion?

The smooth ER is responsible for protein folding, while the rough ER is responsible for protein degradation.

The smooth ER stores calcium ions, while the rough ER synthesizes carbohydrates.

The smooth ER is involved in lipid synthesis, while the rough ER is involved in protein synthesis.

The smooth ER modifies proteins, while the rough ER transports proteins to the Golgi apparatus.

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Verified step by step guidance

Understand the structure of the endoplasmic reticulum (ER): The ER is a network of membranes within the cell, and it comes in two forms - smooth and rough.

Identify the rough ER: The rough ER is studded with ribosomes on its surface, which gives it a 'rough' appearance under a microscope. These ribosomes are the sites of protein synthesis.

Identify the smooth ER: The smooth ER lacks ribosomes, giving it a 'smooth' appearance. It is involved in various metabolic processes, including lipid synthesis and detoxification.

Differentiate the functions: The rough ER 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. The smooth ER, on the other hand, is involved in the synthesis of lipids, metabolism of carbohydrates, and storage of calcium ions.

Relate to protein secretion: In the context of protein secretion, the rough ER plays a crucial role as it synthesizes proteins that are destined for secretion. These proteins are then transported to the Golgi apparatus for further processing and eventual secretion out of the cell.