energy-requiring movement of molecules across a membrane from a region of lower concentration to a region of higher concentration

uptake of liquids or large molecules into a cell by inward folding of the cell membrane

uptake of a solid particle into a cell by engulfing the particle

release of substances out of a cell by the fusion of a vesicle with the membrane

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3.5 Vocab

Term	Definition
Active Transport	energy-requiring movement of molecules across a membrane from a region of lower concentration to a region of higher concentration
Endocytosis	uptake of liquids or large molecules into a cell by inward folding of the cell membrane
Phagocytosis	uptake of a solid particle into a cell by engulfing the particle
Exocytosis	release of substances out of a cell by the fusion of a vesicle with the membrane