Cell Transport Vocabulary

diffusion

The movement of particles from an area of high concentration to an area of low concentration.

osmosis

The diffusion of water through a membrane

passive transport

The diffusion of particles through membrane bound proteins, no energy required

active transport

The movement of particles through membrane bound proteins against the normal direction of diffusion, energy required

endocytosis

The cell membrane surrounds a particle and encloses it in a vesicle, bringing it into the cell

exocytosis

The fusion of a vesicle to the cell membrane and the release of its contents out of the cell.

semi-permeable membrane

A membrane that lets some molecules through but not others

Transpiration

the movement of water molecules from the roots through the stem and out of the leaves of the plant