Active transport: the passage of ions or molecules across a cell membrane, not by passive diffusion but by an energy-consuming process at the expense of catabolic processes proceeding within the cell; in active transport, movement takes place against an electrochemical gradient.
Source: Stedman's Medical Spellchecker, © 2006 Lippincott Williams & Wilkins. All rights reserved.
Active transport: any ATP-driven cellular process for moving solutes or organelles; e.g., ATPase transmembrane pumps, pinocytosis and related membrane flux events, cytoskeletal rearrangements; contrast with PASSIVE TRANSPORT.
Source: CRISP
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Source - CRISP
Source - CRISP
Source: CRISP
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