\Diffusion - Movement of particles from an area of higher concentration to an area of lower concentration. Facilitated Diffusion - Diffusion of molecules through a protein channel. (Does not require energy) Osmosis - Diffusion of water through a selectively permeable membrane. Osmosis Pressure - Pressure that most be applied to prevent osmotic movement across a selectively permeable membrane. Active Transport - Process can move molecules from a lower concentration solution on one side of the membrane to a higher concentration solution on the other side. (Does require energy) Endocytosis - Process in which a substance gains entry into a cell without passing through the cell membrane.(Substance entering the cell) Exocytosis - Process of cellular secretion or excretion in which substances contained in vesicles are discharged from the cell by fusion of the vesicular membrane with the outer cell membrane. (Waste exiting the cell) Homeostasis - Relatively constant internal p
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