Bulk Transport

Question 1

Bulk transport

Answer 1

• aka cytosis
• active transport which involves infolding or outfolding of sections of the cell surface membrane
• involves contractile proteins in cellular microfilmantes and microtubules
• requires ATP

Question 2

Endocytosis

Answer 2

Bulk transport of molecules into a cell

Question 3

Exocytosis

Answer 3

Bulk transport of molecules out of cell

Question 4

Types of endocytosis

Answer 4

• phagocytosis
• pinocytosis
• receptor-mediated endocytosis

Question 5

Phagocytosis

Answer 5

• ‘cellular eating’

* involves invagination

Question 6

Invagination

Answer 6

• an infolding of the cell surface membrane
• used to transport solid substances (sometimes whole organsims) inside the cell
• forms a vacuole, deriving the inner surface from the outer surface of the cell surface membrane
• uses dissolved solutes
• e.g. phagocytes, amoeba

Question 7

Pinocytosis

Answer 7

• ‘cellular drinking’
• similar process as phagocytosis; infoldings are much smaller
• liquids or large macromolecules (e.g. proteins) are taken in via a small vesicle

Question 8

Describe exocytosis

Answer 8

Vesicles and vacuoles move to the cell surface membrane, fuse with it and release their cargo to the outside environment