Active Transport--energy required (ATP--nucleic acid)
-movement of molecules from an area of low concentration to high concentration -against the concentration gradient Endocytosis-transport of molecules into the cell by using energy to engulf them Exocytosis-transport of molecules out of the cell by using energy |
Passive Transport--no energy required
-movement of molecules from an area of high concentration to low concentration -with the concentration gradient Diffusion--movement of any molecules Osmosis---movement of H2O only Facilitated diffusion--movement of molecules with the help of a protein in the cell membrane |
OSMOSIS--MOVEMENT OF H2O