| transport | <radiobiology> Refers to processes which cause heat energy, or particles, or something else, to flow out of the plasma and cease being confined. Diffusion partly determines the rate of transport. Energy losses from a plasma due to transport processes are a central problem in fusion energy research. See: classical transport, neoclassical transport, anomalous tranport, diffusion, ambipolar diffusion, Bohm diffusion, classical diffusion, neoclassical diffusion, anomalous diffusion, energy transport, ripple transport. (09 Oct 1997) |
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| transport antibiotic | A substance that makes biomembranes permeable to certain ions. (05 Mar 2000) |
| transport diseases | Single gene defect diseases in which there is an inability to transport particular small molecules across membranes. Examples are aminoacidurias such as cystinuria, iminoglycinuria, Hartup disease, Fanconi disease. (18 Nov 1997) |
| transport host | An intermediate host in which no development of the parasite occurs, although its presence may be required as an essential link in the completion of the parasite's life cycle; e.g., the successive fish host's that carry the plerocercoid of Diphyllobothrium latum, the broad fish tapeworm, to larger food fish eventually eaten by man or other final host's. Synonym: transport host. (05 Mar 2000) |
| transport medium | A medium for transporting clinical specimens to the laboratory for examination. (05 Mar 2000) |
| transport number | The fraction of the total current carried through a solution by a particular type of ion present in that solution. (05 Mar 2000) |
| transport protein | <protein> A class of transmembrane protein that allows substances to cross plasma membranes far faster than would be possible by diffusion alone. A major class of transport proteins expend energy to move substances (active transport), these are transport ATPases. See: facilitated diffusion, symport, antiport. (18 Nov 1997) |
| transport tetany | An acute disease seen in cattle and sheep during and shortly after shipping; it appears most often in females in advanced pregnancy and is believed to be precipitated by stress, lack of food and water, and perhaps heat. Synonym: railroad disease, railroad sickness. (05 Mar 2000) |
| transport vesicle | <cell biology> Vesicles that transfer material from the rough endoplasmic reticulum to the receiving face of the Golgi. (18 Nov 1997) |
| transportal | Transportation; the act of removing from one locality to another. "The transportal of seeds in the wool or fur of quadrupeds." Source: Websters Dictionary (01 Mar 1998) |
| transportase | <protein> A class of transmembrane protein that allows substances to cross plasma membranes far faster than would be possible by diffusion alone. A major class of transport proteins expend energy to move substances (active transport), these are transport ATPases. See: facilitated diffusion, symport, antiport. (18 Nov 1997) |
| transportation | The means of moving persons, animals, goods, or materials from one place to another. (12 Dec 1998) |
| transportation of patients | Conveying ill or injured individuals from one place to another. (12 Dec 1998) |
| transporter | Proteins that go completely through a cell membrane and carry specific nutrients, ions, etc. Across the membrane. (09 Oct 1997) |
| active transport | <biochemistry, chemistry> Transport of ions, nutrients or other molecules into a cell against a concentration gradient, this requires the expenditure of energy through ATP hydrolysis. (06 May 1997) |
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| anterograde transport | Movement of material from the cell body of a neuron into axons and dendrites retrograde axoplasmic transport also occurs). (18 Nov 1997) |
| atrial transport function | The role of the atria in filling and stretching the ventricles by their presystolic contraction, without which the force of ventricular contraction and hence the cardiac output may significantly decrease. (05 Mar 2000) |
| axonal transport | Directed transport of organelles and molecules along a nerve cell axon. Transport can be anterograde (from the cell body) or retrograde (toward the cell body). (alberts et al., molecular biology of the cell, 3d ed, pg3) (12 Dec 1998) |
| axoplasmic transport | Transport by way of flow of axoplasm toward cell soma (retrograde) or toward axon terminal (anterograde). (05 Mar 2000) |
| biological transport | The movement of materials (including biochemical substances and drugs) across cell membranes and epithelial layers, usually by passive diffusion. (12 Dec 1998) |
| biological transport, active | The movement of materials across cell membranes and epithelial layers against an electrochemical gradient, requiring the expenditure of metabolic energy. (12 Dec 1998) |
| vectorial transport | <physiology> Transport of an ion or molecule across an epithelium in a certain direction (e.g. absorption of glucose by the gut). Vectorial transport implies a nonuniform distribution of transport proteins on the plasma membranes of two faces of the epithelium. (06 Mar 2000) |
| paracellular transport | Solvent movement across an epithelial cell layer through the tight junctions between cells. Compare: transcellular transport. (05 Mar 2000) |
| vesicular transport | <cell biology> Process of transport of material across an epithelium by uptake on one face into a coated vesicle, which may then be sorted through the trans Golgi network and transported to the opposite face in another set of vesicles. (17 Mar 1998) |
| passive transport | <biochemistry, physiology> The movement of a substance, usually across a plasma membrane, by a mechanism that does not require metabolic energy. See: active transport, transport protein, facilitated diffusion, ion channels. (18 Nov 1997) |
| renal tubular transport, inborn errors | Genetically determined disorders of the reabsorptive functions of the kidney with regard to specific nephron segments responsible for specific transport functions, classifiable by proximal nephron function, loop of henle function, and distal nephron function. The transport defects can be selective or nonselective. (12 Dec 1998) |
| respiratory transport | The processes of gas exchange and various metabolic functions taking place in the lung, generally at the alveolar level. (12 Dec 1998) |
| membrane transport | <cell biology> The transfer of a substance from one side of a plasma membrane to the other, in a specific direction and at a rate faster than diffusion alone. See: active transport. (18 Nov 1997) |
| retrograde axonal transport | <cell biology> The transport of vesicles from the synaptic region of an axon towards the cell body: involves the interaction of MAP1C with microtubules. (11 Jan 1998) |