a. active transport b. facilitated diffusion c. diffusion d. osmosis e. exocytosis

___ 1. The movement of molecules from an area of HIGH concentration to an area of LOW concentration.
___ 2. The diffusion of water molecules.
___ 3. Energy is used to move molecules from an area of LOW concentration to an area of HIGH concentration.
___ 4. Membrane proteins are used to move molecules across the membrane but no energy is required.
___ 5. The movement of molecules down their concentration gradient.
___ 6. The movement of molecules up/against their concentration gradient.
___ 7. Membrane proteins are used to move molecules across the membrane but energy from ATP is required.
___ 8. A type of active transport that involves vesicles moving molecules out of a cell.