diffusion Flashcards
1
Q
define facilitated diffusion
A
large or polar molecules diffuse across a membrane with aid of a protein(channel/carrier)
passive process
2
Q
what do channel protein facilitate
A
ions and small molecules
3
Q
how do channel proteins facilitate diffusion
A
act like pore in the membrane
often can be opened and closed to change the flow
4
Q
what do carrier protein facilitate
A
larger molecules
5
Q
how do carrier proteins facilitate diffusion
A
molecules attach to the protein and it changes shape to transfer the molecule across the membrane
active/passive
