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Cellular Transport

definitions associated with active and passive transport

TermDefinition
active transport the movement of substances from low concentration to high concentration against the concentration gradient; requires energy
passive transport the movement of substances from high concentration to low concentration without requiring energy
osmosis diffusion of water across a semi-permeable membrane from high to low concentration
diffusion a form of passive transport; movement of particles from high concentration to low concentration
facilitated diffusion the movement of large particles from high concentration to low concentration with help from a protein
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