例句與造句

1. On the other hand , a positive inotropic response was induced by il - 2 in isolated rat atria , indirectly by activating myocardial 3 - adrenoceptors by release of catecholamines , and directly by increasing the production of second messenger camp . in the isolated rat heart , stimulation of cardiac k opioid receptors has been shown to induce ventricular ectopic beats and to reduce the force of ventricular contraction
   通過文獻調研和我們的預實驗，我們假設， il - 2的心臟作用涉及心肌細胞收縮力和細胞內鈣的變化，其信號轉導途徑可能并非通過自身受體，而是通過存在于心肌細胞膜上的阿片受體發(fā)揮作用的；其對血管的作用可能循相關途徑。
2. It's difficult to find ectopic beats in a sentence. 用ectopic beats造句挺難的