1.3 Bulk Transport Flashcards
(15 cards)
Is bulk transport an active process?
Yes - it requires ATP.
How are large quantities of molecules moved in and out of the cell?
Via endocytosis and exocytosis.
How is bulk transport possible?
Because membranes can easily pinch off and fuse.
How does endocytosis work?
The cell membrane engulfs particles or liquid forming a vesicle which enters the cytoplasm.
What is the first step of endocytosis?
Plasma membrane folds inwards.
What is the second step of endocytosis?
Plasma membrane continues to fold, engulfing the material.
What is the third step of endocytosis?
Plasma membrane fuses to enclose the material.
What are the two types of endocytosis?
Phagocytosis and pinocytosis.
What does phagocytosis mean?
Cell eating.
What does pinocytosis mean?
Entry of liquid into the cell.
What is endocytosis?
Transport of materials into the cell.
What is exocytosis?
Transport of materials out of the cell.
Exocytosis is part of what?
Protein synthesis.
What happens in exocytosis?
Materials are first enclosed in a membrane vesicle via the RER or the Golgi body.
Can material pass straight through cells without ever making contact with the cytoplasm?
Yes, if they are taken in by endocytosis at one end of the cell and passing out via exocytosis the other end.
