ion channels Flashcards
1
Q
ion channel
A
protein embedded inside the lipid bilayer, cylinder with a small hole in it that allows ions to move through through
2
Q
why are ion channels needed
A
certain ions are more concentrated inside than outside. with no barrier the ions would flow in / out to equalise it, but the cell also neebds molecules and energy to work
3
Q
types of ion channels
A
open, closed, leaky
4
Q
how many ions do channels allow through
A
one type
5
Q
what channels are always open
A
leaky potassium channels
6
Q
how do leaky channels work
A
concentration force drives potassium out, eletrical force pushes potassium back in
7
Q
voltage gated ion channels
A
only open depending on the membrane potential and the voltage of the membrane
