| energy coupling | <chemistry> The tranfer of energy produced in one reaction to another. (09 Oct 1997) |
|---|---|
| excitation contraction coupling | <physiology> Name given to the chain of processes coupling excitation of a muscle by the arrival of a nervous impulse at the motor end plate to the contraction of the filaments of the sarcomere. The crucial link is the release of calcium from the sarcoplasmic reticulum and the analogy is often drawn between this and stimulus secretion coupling, that also involves calcium release into the cytoplasm. (18 Nov 1997) |
| fixed coupling | Where several premature beats are seen, the interval between each of them and the preceding normal beat is constant. Synonym: constant coupling. Variable coupling, where several extrasystoles are seen, the interval between each of them and the preceding sinus beat varies. (05 Mar 2000) |
| basal medium | <cell culture> An unsupplemented medium which promotes the growth of many types of microorganisms which do not require any special nutrient supplements. (15 Nov 1997) |
| ganglion cervicale medium | A sympathetic ganglion, of small size and sometimes absent; located at the level of the cricoid cartilage. Synonym: ganglion cervicale medium. (05 Mar 2000) |
| ramus lateralis ramorum lobaris medium arteriorum pulmonalium dextrorum | Lateral branch of middle lobe branch of right pulmonary artery. See: lateral branches. (05 Mar 2000) |
| passive medium | A medium that produces no change in the specimens placed in it. (05 Mar 2000) |
| mediastinum medium | The central portion of the inferior mediastinum which contains the pericardium and its contents and the phrenic nerves and accompanying vessels. Synonym: mediastinum medium. (05 Mar 2000) |
| medium | <cell biology> Shorthand for culture medium or growth medium, the nutrient solution in which cells or organs are grown. (18 Nov 1997) |
| medium artery | <anatomy, artery> An artery with a tunica media composed principally of circularly arranged smooth muscle. Synonym: distributing artery, medium artery. (05 Mar 2000) |
| medium-chain acyl-CoA dehydrogenase | <enzyme> Deficiency in mitochondrial beta oxidation of fatty acids gives a disorder frequently masquerading as reye syndrome or sudden infant death; leads to buildup of octanoyl carnitine in urine Registry number: EC 1.3.- Synonym: mcaca-dehydrogenase, medium-chain acyl-coenzyme a dehydrogenase, octanoyl-CoA dehydrogenase, mcad enzyme (26 Jun 1999) |
| medium vein | <anatomy, vein> A vein characterised by having a thinner wall and larger lumen than its corresponding artery, and a media with small bundles of circular muscle separated by considerable connective tissue; valves also occur. (05 Mar 2000) |
| growth medium | <cell culture> A synthetic medium which is filled with nutrients necessary to the growth of microorganisms or cells being cultured in the lab. (09 Oct 1997) |
| clearing medium | A medium used in histology for making specimens translucent or transparent. (05 Mar 2000) |
| minimal medium | <cell culture> The simplest tissue culture medium that will support the proliferation of normal cells. (18 Nov 1997) |