论文部分内容阅读
哺乳动物的肺泡里面衬着一层表面活性物质,其主要成分是卵磷脂,并有少量鞘磷脂和其他物质。它具有降低表面张力和防止肺泡萎陷的作用。正常胎儿在临产前才有足量的肺表面活性剂,早产儿多因此种物质不足,致出现呼吸窘迫综合症和死亡。因而对于阻碍肺发育的环境因子,有必要明确它对肺泡里面活性剂有无影响。
The mammalian alveoli are lined with a layer of surface-active substance, the main component is lecithin, and a small amount of sphingomyelin and other substances. It has the effect of reducing surface tension and preventing alveolar collapse. Normal fetuses have enough pulmonary surfactant before labor, premature children are often due to lack of material, resulting in respiratory distress syndrome and death. Thus for the environmental factors impeding the development of the lungs, it is necessary to determine whether it has an effect on the alveolar inside the active agent.