| 释义 |
passive transport
passive transportn. The movement of a chemical substance across a cell membrane without expenditure of energy by the cell, as in diffusion.Thesaurus| Noun | 1. | passive transport - transport of a substance across a cell membrane by diffusion; expenditure of energy is not requiredtransport - an exchange of molecules (and their kinetic energy and momentum) across the boundary between adjacent layers of a fluid or across cell membranes |
EncyclopediaSeetransportpassive transport
transport [trans´port] 1. movement of materials in biologic systems, particularly across the membrane" >cell membrane into and out of cells or across epithelial layers.2. in the nursing interventions classification, a intervention" >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 membranes" >cell membranes, by processes not requiring expenditure of metabolic energy. See also active transport.fa·cil·i·tat·ed trans·portthe protein-mediated transport of a compound across a biomembrane that is not ion-driven; a saturable transport system. Synonym(s): passive transportpassive transportn. The movement of a chemical substance across a cell membrane without expenditure of energy by the cell, as in diffusion.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). 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.passive transport see DIFFUSION.pas·sive trans·port (pas'iv trans'pōrt) The movement of particles or ions across a semipermeable membrane without the expenditure of energy. FinancialSeediffusionpassive transport
Related to passive transport: bulk transportWords related to passive transportnoun transport of a substance across a cell membrane by diffusionRelated Words |