• prey's
  • In this study, we examined the cardiovascular function of anesthetized rats before, during and after being constricted by boas ( Boa constrictor ) to examine the effect of constriction on the prey's circulatory function. (biologists.org)
  • Instead, a study of death caused by boa constrictors, showed that constriction "shuts off" blood flow (and therefore oxygen) needed by vital organs such as the heart and brain, which would lead to unconsciousness and death very quickly - in seconds - in other words, constriction can interrupt blood flow and overwhelm the prey's usual blood pressure and circulation. (wikipedia.org)
  • rats
  • To investigate a potential relation between the 2 mechanisms, we studied coronary arteries of Sprague-Dawley rats for individual myogenic constriction compared with EDHF-mediated dilation of the same artery. (ahajournals.org)
  • By the end of constriction (mean 6.5±1 min), rat PBP dropped 2.9-fold, f H dropped 3.9-fold, systemic perfusion pressure (SPP=PBP−CVP) dropped 5.7-fold, and 91% of rats (10 of 11) had evidence of cardiac electrical dysfunction. (biologists.org)
  • Blood drawn immediately after constriction revealed that, relative to baseline, rats were hyperkalemic (serum potassium levels nearly doubled) and acidotic (blood pH dropped from 7.4 to 7.0). (biologists.org)
  • cardiac
  • Recently, the pressures produced during constriction have been suggested as the cause of cardiac arrest by interfering with blood flow, but this hypothesis has not yet been confirmed. (wikipedia.org)
  • species
  • The secondary constriction also contains the genes for rRNA synthesis (18 S, 5.8 S, 28 S) NOR occurs in SAT (satellite chromosome) chromosomes (13,14,15,21,22) "Karyomorphological Studies of Species in Taxodiaceae " - METLA "Physical locations of 5S and 18S-25S rDNA in Asian and American diploid Hordeum species with the I genome" - Heredity "Evolutionary aspects of the ZZ/ZW sex chromosome system in the Characidae fish, genus Triportheus. (wikipedia.org)
  • time
  • Further research on my part hasn't yielded anything else, so I'll keep both "constriction" and "necking" in mind for the time being. (proz.com)
  • In Drosophila, researchers have also pinpointed the molecules responsible for coordinating apical constriction in time. (wikipedia.org)
  • Folded Gastrulation (Fog), a secreted protein, and Concertina, a G alpha protein, are members of the same pathway that ensure that apical constriction is initiated in the right cells at the right time. (wikipedia.org)
  • Tools
  • 23-26 Activators of potassium channels are used as vasodilative therapeutic tools in hypertension, as they oppose (myogenic) constriction. (ahajournals.org)
  • pressure
  • In hypertension, pressure-induced myogenic constriction and impaired endothelium-derived hyperpolarizing factor (EDHF)-mediated dilation may contribute to increased vasomotor tone. (ahajournals.org)
  • Increased myogenic constriction in several forms of hypertension appears to be associated with more depolarized resting membrane potential and smooth muscle calcium levels also when studied at comparable/normotensive blood pressure levels. (ahajournals.org)
  • field
  • These three cases have the common feature of symptomatic constriction of the visual field two to three years after starting vigabatrin treatment. (bmj.com)
  • One reported case of unilateral visual field constriction was ascribed to an immune mediated anterior ischaemic optic neuropathy. (bmj.com)
  • 2 A literature search found brief details of one other case of bilateral field constriction apparently induced by vigabatrin. (bmj.com)
  • In computer field, constriction is a method of decreasing resolution of a video. (wikipedia.org)
  • given
  • Alpha-receptors were not required for O 2 or bradykinin constriction since these agents constricted the umbilical artery after enough phentolamine had been given to block constriction by norepinephrine. (ahajournals.org)
  • Laboratory experiments and the analysis were directed toward the development of methods for (a) computing discharge through multiple-opening constrictions, (b) apportioning a given total discharge among the several openings, and (c) predicting the backwater caused by the constriction. (usgs.gov)
  • Flow
  • The present investigation of the flow pattern at constrictions with two to seven openings is a continuation of the earlier study. (usgs.gov)
  • It is shown that the relations developed for the constriction with a single opening are applicable to each opening of a multiple-opening constriction once the boundaries of the separate flow channels have been established. (usgs.gov)
  • You flow to the a venturi constriction that is 5 m wide. (physicsforums.com)
  • known
  • In S. pombe , the AMR undergoes multiple phases known as assembly, maturation, constriction, and disassembly ( 4 ), with open questions in each of these four stages. (pnas.org)
  • effect
  • For comparison, in mesenteric arteries (at 70 mm Hg) low myogenic constriction (2±1%) was associated with high EDHF-mediated dilation (93±2%), and pretreatment with NS1619 had no effect. (ahajournals.org)
  • Share
  • Myogenic constriction as well as EDHF-mediated dilation may share common signaling mechanisms, and both may control K Ca channel activity to set arterial tone. (ahajournals.org)
  • smooth
  • 6,7 On the intraluminal side of the blood vessel lies the endothelium, an important producer of mediators such as endothelin-1 and contractile prostaglandins, but also prostacyclin, nitric oxide (NO), and endothelium-derived hyperpolarizing factor (EDHF), all of which act on underlying smooth muscle cells causing constriction or dilation to regulate vasomotor tone. (ahajournals.org)