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单选题
对冠脉血流量进行调节的各种因素中，最重要的是（）
A
心肌本身的代谢水平
B
交感神经的兴奋程度
C
迷走神经的兴奋程度
D
肾上腺素和去甲肾上腺素的多少
E
血管紧张素的多少
参考答案
参考解析
解析：
对冠脉血流量进行调节有神经和体液2种机制，体液调节更为重要。
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