Résumé
The mixed evaluation system uses the network platform as a carrier to construct a dynamic evaluation model that spans time and space between online and offline, between individuals and teams. Mixed evaluation system of physiology was performed for two years, and the process evaluation and the summative evaluation in the mixed evaluation system showed a good correlation, and the students' learning ability and learning effect showed consistency with the evaluation results. Practice has proved that the mixed evaluation system not only optimizes the traditional evaluation system, but also fully expands the five principles of formative evaluation; however, while reflecting the advantages of the network platform, it also exposes the defects of insufficient supervision of the network platform. Thus, we should further improve the mixed evaluation system of physiology.
Résumé
<p><b>OBJECTIVE</b>To study the vasodilation effects of the Total alkali Sophora alopecuroids L (TASa) on rabbit thoracic aortic rings in vitro and the possible mechanisms.</p><p><b>METHOD</b>Rabbit aortic rings were isolated and precontracted with noradrenaline (NA) and then were divided into six groups including control group, TASa group, TASa + 1 x 10(-5) mol x L(-1) indomethacin (Indo), TASa + 1 x 10(-5) mol x L(-1) propranolol (Prop), TASa + 1 x 10(-10 mol x L(-1) N(omega)-nitro-L-arginine (L-NNA), TASa + removal of endothelium. The vasodilation effects of TASa were investigated. In addition, the thoracic aortic rings were pre-treated with TASa (40 mg x L(-1)) and then the thoracic aortic rings were treated with cumulative NA (110(-8)-110(-5) mol x L(-1)), KCl (6.3-100 mmol x L(-1)) or CaCl2 (110(-5)-110(-2) mol x L(-1)). The dose response curves of aortic rings were recorded.</p><p><b>RESULT</b>TASa can relax isolated rabbit aorta and has an obvious concentration-dependent relaxation (r = 0.94, P < 0.01). The relaxant effect of TASa was no significant reducing by removal of endothelium and by treatment with L-NNA, Indo or Prop. In addition, TASa can decrease the dose response curves of aortic rings to NA, KCl or CaCl2.</p><p><b>CONCLUSION</b>The vasodilation effects of TASa are related to not only inhibition of intracellular calcium release, but also reduction to calcium flow to the interior of the cell with blockage of calcium channels.</p>