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Brice was listening to her brother's account of a frightening encounter last night. he was at home, in bed, when he heard a loud sound outside his window. his heart rate and breathing increased immediately. brice told her brother that his _____ was what initiated this fight-or-flight response.

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SeoJoon15

The correct answer is epinephrine. This is also known as adrenaline by which they function primarily in one’s cardiac output that it is possible for a person to quickly experience an improve breathing, raise a dropping blood pressure, and stimulate the heart.