Matching: Match each description with the correct term.
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.

Facilitated diffusion is the movement of molecules from an area of high concentration to an area of low concentration. Osmosis is the process of diffusion of water molecules. Active Transport moves molecules from and low concentration to an area of high concentration by using ATP energy. Passive transport is the movement of molecules across the membrane without using energy. Diffusion is the movement of molecules down their concentration gradient. Active Transport moves molecules up the concentration gradient and across the membrane using energy from ATP. Exocytosis is active transport that requires energy, it is the fusion of secretory vesicles with the plasma membrane. Exocytosis exports molecules out of the cell.