摘要
颈动脉体是机体内一种化学感受器 ,在机体血液内出现缺氧、CO2 分压升高、H+浓度增加等变化时 ,颈动脉体接受刺激而使机体发生相应的变化 ,表现为呼吸加深加快 ,心跳加快 ,心输出量增多 ,脑和心脏血流量加大 ,而腹腔内脏的血流量减少等综合征 ,而且缺氧时颈动脉体细胞成分 ,电子致密核心囊泡 ,细胞内pH和膜电位等也发生变化。一般认为 ,颈动脉体主细胞胞浆内的电子致密核心囊泡是具有调节心血管及呼吸功能的神经分泌颗粒。颈动脉体接受交感神经颈前节。
Carotid body(CB) is a kind of chemical receptor in the organism which changes correspondly with stimulus such as the lack of oxygen, heightening of CO_2 subpressure, increasing of H^+concentration and change of chemical ingredient. Because of this, some synthetic symptoms would emerge in the organism, such as acceleratino of breath,speeding up of heart-beat, adding the heart blood output, increasing blood-current quantum of brain and heart, decreasing blood-current quantum of internal organs in abdomen, furthermore,scarce oxygen would also lead to change of CB cell ingredient, electronic dense core vesicle, pH in cell and film electric-potential. EDCV of carotid body main-cell plasma was thought generally to be the nerve secreting pellet who could regulate heart blood vessel and respiration function.As far as nerve dominated was concerned, CB was dominated by sympathtic nerve's cervical superius ganglion,glossophar ngeus nerve and vagus nerve.
出处
《动物医学进展》
CSCD
2005年第1期16-18,共3页
Progress In Veterinary Medicine
关键词
颈动脉体
化学感受器
carotid body
chemical receptor
