【单选题】【消耗次数：1】
肾上腺素和去甲肾上腺素对心血管的效应是（）
①
两者的升压效应相同
②
两者引起的心率变化相同
③
小剂量的肾上腺素使骨骼肌微动脉舒张
④
去甲肾上腺素使胃肠道微动脉舒张
⑤
在完整机体中，注射去甲肾上腺素后引起血压升高，心率加快
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