Membrane Transport

Question 1

Passive transport

Answer 1

Does not involve energy, follows concentration gradient

Question 2

Examples of passive transport

Answer 2

Simple diffusion

Facilitated diffusion

Question 3

Simple diffusion

Answer 3

Passive, molecules are able to pass directly through the phosolipid bilayer (cell membrane).

Oxygen, carbon dioxide and alcohol

Question 4

Facilitated diffusion

Answer 4

Uses protein/channel to diffuse

Question 5

Active transport

Answer 5

Requires energy, goes against the concentration gradient

Question 6

Vesicular transport

Answer 6

Active transport
Exocytosis, leaving the cell
Endocytosis, enterring the cell

Question 7

Osmosis

Answer 7

Is a facilitated diffusion - uses protein

Question 8

Factors which affect the transport of the cell membrane

Answer 8

Membrane thickness : molecules have a harder time to get through the membrane
Temp/ pressure : temp can affect what goes through, if its cold the membrane cannot get molecules through as it if frozen/cold
Concentration gradient : High to low
Surface area : Larger area = Higher rate of diffusion