Finally, norepinephrine amps you up by triggering your fight or flight response, increasing your heart rate, and priming muscles to engage, while an undersupply of the chemical can depress a mood.

最后，去甲肾上腺素通过触发你的战斗或逃跑反应来放大你的反应，增加你的心率，让肌肉开始参与，而化学物质的供应不足会抑制情绪。