Biology / Bio 0368 · Atom · ~20 seconds
Endocytosis
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Endocytosis is active transport bringing large particles into a cell by folding the plasma membrane around the particle and pinching off a new vesicle.
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A cell taking in a large molecule this way spends energy forming and pinching off the vesicle, unlike smaller-molecule transport.
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Endocytosis moves material by enclosing it in membrane, not by passing it through existing proteins.