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Questions and Answers
Where do microvesicles originate from?
Where do microvesicles originate from?
- The mature surface of the Golgi stack
- Lysosomes
- The cell membrane
- The rER (correct)
What is the primary function of macrovesicles?
What is the primary function of macrovesicles?
- Protein synthesis
- Cell signaling
- Discharging content outside the cell via exocytosis (correct)
- Cell division
What is the primary location of macrovesicles?
What is the primary location of macrovesicles?
- Imature surface
- rER
- Lysosomes
- Mature surface (correct)
What is the fate of some macrovesicles?
What is the fate of some macrovesicles?
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What is a characteristic of microvesicles?
What is a characteristic of microvesicles?
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Study Notes
Microvesicles (Transfer Vesicles)
- Small, electron-dense vesicles present at the immature surface of the Golgi apparatus
- Originate from budding of the rough endoplasmic reticulum (rER)
- Contain newly formed proteins
Macrovesicles (Secretory Vesicles)
- Larger in size compared to microvesicles
- Present at the mature surface of the Golgi stack
- Formed by pinching off from the mature surface of the Golgi stack
- Migrate to the cell membrane and fuse with it
- Discharge their content outside the cell through exocytosis
- Can also remain in the cell as lysosomes
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