However , there is little know about the effect of iron on relaxation and contraction function of blood vessels , and the underlying mechanism was also unclear 然而,目前对于铁的增加引起内皮依赖性血管舒张功能改变的直接效应以及可能的机制并不清楚。此外,铁对血管收缩功能的影响目前仍不明确。
The alteration of hemodynamic factors that arise from contraction of the myocardial bridge greatly affects the evolution of atherosclerosis through the regulation of intimal lipid infiltration within the artery 因此处血管收缩导致的血行动力改变,大幅地影响粥状硬化的形成及内膜脂质浸润的调控。
Sympathomimetics can elevate the body temperature by two mechanisms . firstly , vasoconstriction decreases skin blood flow and hence heat loss . secondly , metabolic heat production is increased 拟交感神经作用药物会令血管收缩,减少皮肤血液流量以致散热减低,同时会增加代谢性热能的产生,令体温升高。
Measurements of intensity similarity on the end points and displacement similarity on other points are introduced into the external energy to avoid model shrinking and shift along the object during deforming , which are common in open snake 通过在外部能量中引入对端点的灰度相似度和对中间点的运动相似度的测量,有效地避免了模型沿血管收缩或漂移的现象。
This inactive product is cleaved by a converting enzyme , mainly in the lung but also in the kidney and brain , to an octapeptide , angiotensin ii , which is a potent vasoconstrictor that also stimulates release of aldosterone 这一非活性产物经转换酶裂解,主要是在肺部但也在肾和脑部,成为八肽,即血管紧张素,这是和中强烈的血管收缩素,可刺激醛固酮的释放。