passive transport


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Related to passive transport: bulk transport

transport

 [trans´port]
1. movement of materials in biologic systems, particularly across the cell membrane into and out of cells or across epithelial layers.
2. in the nursing interventions classification, a nursing intervention defined as moving a patient from one location to another.
active transport see active transport.
oxygen transport the carrying of oxygen through the bloodstream bound to hemoglobin (see oxyhemoglobin).
passive transport the movement of materials, usually across cell membranes, by processes not requiring expenditure of metabolic energy. See also active transport.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

fa·cil·i·tat·ed trans·port

the protein-mediated transport of a compound across a biomembrane that is not ion-driven; a saturable transport system.
Synonym(s): passive transport
Farlex Partner Medical Dictionary © Farlex 2012

passive transport

n.
The movement of a chemical substance across a cell membrane without expenditure of energy by the cell, as in diffusion.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

pas·sive trans·port

(pas'iv trans'pōrt)
The movement of particles or ions across a semipermeable membrane without the expenditure of energy. It is directly influenced by chemical or electrical gradients: the difference in the number of particles on either side of the membrane (chemical) or a difference in charged particles or ions (electrical).
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

passive transport

The movement of dissolved material through a biological membrane in the direction of fluid flow and without the expenditure of energy. Compare ACTIVE TRANSPORT.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

passive transport

see DIFFUSION.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

pas·sive trans·port

(pas'iv trans'pōrt)
The movement of particles or ions across a semipermeable membrane without the expenditure of energy.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
This may be responsible for the increase in passive transport of calcium observed in this group of rats.
If water currents were always rapid enough to exceed critical erosion velocities for all sizes of Gemma, then passive transport should not be size selective.

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