biological membranes Flashcards
1
Q
what is a plasma membrane?
A
cell surface membrane
2
Q
what is diffusion?
A
movement of molecules from a high concentration to a low concentration
3
Q
what is facilitated diffusion?
A
molecules move from low concentration to a high concentration using ATP.
4
Q
what are the factors that effect simple diffusion?
A
- temperature
- diffusion distance
- surface area
- size of diffusing molecule
- concentration gradient
5
Q
what is osmosis?
A
the movement of water from a high concentration to a low concentration.
