"脑血管的自身调节"是指有动脉血压下降到低于正常值的多少时,脑血流才出现较明显减少A.10%B.20%C.50%D.70%E.80%

作者: rantiku 人气: - 评论: 0
问题 "脑血管的自身调节"是指有动脉血压下降到低于正常值的多少时,脑血流才出现较明显减少
选项 A.10% B.20% C.50% D.70% E.80%
答案 C
解析 :只有动脉血压下降到低于正常值的50%时,脑血流才出现较明显减少,这就是"脑血管的自身调节"。

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