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人喝啤酒为什么脸红

更新时间: 2020-09-15 00:00:00     

是因为皮下暂时性血管扩张所致。

人体的血管受两种神经的支配,一种叫交感神经,兴奋时能促使血管扩张 ;另一种叫副交感神经,兴奋时能促使血管收缩,抑制时使血管扩张。平时,这两种神经互相协调支配血管的收缩和扩张。酒精能使交感神经兴奋,并抑制副交感神经,使血管比平时大为扩张。脸部皮肤薄,毛细血管又多,所以人喝酒之后脸会发红。

关键词: 啤酒 为什么 脸红

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