16. 다음 글의 흐름상 가장 어색한 문장은?
When the brain perceives a threat in the immediate surroundings, it initiates a complex string of events in the body. It sends electrical messages to various glands, organs that release chemical hormones into the bloodstream. Blood quickly carries these hormones to other organs that are then prompted to do various things. ①The adrenal glands above the kidneys, for example, pump out adrenaline, the body’s stress hormone. ②Adrenaline travels all over the body doing things such as widening the eyes to be on the lookout for signs of danger, pumping the heart faster to keep blood and extra hormones flowing, and tensing the skeletal muscles so they are ready to lash out at or run from the threat. ③The whole process is called the fight-or-flight response, because it prepares the body to either battle or run for its life. ④Humans consciously control their glands to regulate the release of various hormones. Once the response is initiated, ignoring it is impossible, because hormones cannot be reasoned with.
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