肺脏換气量是直接受神經中枢及間接地受化学感受性反射的影响。众所周知,任何刺激性物貭均能引起呼吸道反射而产生浅与快式的呼吸。有許多物理因素,例如在矿厂区与街道上都有粉尘,它可以增加呼吸道的阻力而引起呼吸性反射作用;其中足以引起矽肺的那种較大的粉尘,其顆粒直径在1—5微米大小,可以依靠戴口罩来避免吸入。但是 Lung ventilation is directly affected by the central nervous system and indirectly by the impact of chemoreflex. It is well-known that any irritant 貭 can cause respiratory reflexes to produce shallow and rapid breathing. There are many physical factors, such as dust in mills and streets, which can increase respiratory resistance and cause respiratory reflexes; the larger type of dust that is sufficient to cause silicosis, with a particle size of 1-5 microns in size , You can rely on wearing masks to avoid inhalation. but