何谓降压反射?有何意义?

作者: rantiku 人气: - 评论: 0
问题 何谓降压反射?有何意义?
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解析 当血压突然升高,刺激颈动脉窦、主动脉弓压力感受器时,反射性地引起心跳变慢、收缩力减弱、心排血量减少;同时外周血管扩张,外周阻力降低,使血压降低至原来水平,称为降压反射。该反射的生理意义是维持血压的相对稳定。

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