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当一个人过度紧张时,会出现手足发凉现象,此时( )A.交感神经活动加强,皮肤的血管舒张B.交感神经
当一个人过度紧张时,会出现手足发凉现象,此时( )A.交感神经活动加强,皮肤的血管舒张B.交感神经
2025-03-14 13:18:20
推荐回答(1个)
回答1:
交感神经是动物体内的“应急性神经”,在一些特殊情况下,其活动加强,可引起心跳加快加强、皮肤血管收缩等,皮肤血管收缩导致皮肤的血流量低,出现手足发凉现象.
故选:C.
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