颈动脉小球位于A．颈内动脉起始处的膨大处B．颈总动脉分叉处的后方C．颈外动脉起始处的后方D．颈总动脉起始处的后方E．颈血管鞘的内面

作者: rantiku 人气: - 评论: 0

问题颈动脉小球位于

选项 A．颈内动脉起始处的膨大处 B．颈总动脉分叉处的后方 C．颈外动脉起始处的后方 D．颈总动脉起始处的后方 E．颈血管鞘的内面

答案 B

解析：在颈总动脉分叉处的后壁有一卵圆形小体，称颈动脉小球，为化学感受器，能感受血中CO浓度的变化。

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