Diffusion and Osmosis

7th grade diffusion and osmosis terms
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Diffusion
The movement of molecules from an area of greater concentration to an area of lower concentration.
Osmosis
The movement of water across a semi-permeadble membrane through diffusion.
Active Transport
The movement of molecules from an area of lower concentration to an area of higher concentration (requiring energy).
A cell is always trying to reach...
equilibrium
Selectively Permeable Membrane
A membrane that allows certain molecules to pass through it by diffusion
Endocytosis
The intake of matreials through membrane sacs.
Exocytosis
The export of materials using membrane sacs.
Passive Transport
The movement of particles from an area of high concentration to an area of low concentration; does not require energy
Equilibrium
The condition of a system in which competing influences are balanced; all particles become equal
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