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Human Endocrine System
Question

A person encounters a growling Doberman dog during a morning walk and runs away with fear. Which of the following hormones has triggered this response? 

Easy
Solution

Epinephrine and norepinephrine augment the fight-or-flight response. By increasing the heart rate and force of contraction, epinephrine and norepinephrine increase the cardiac output and blood pressure. They also increase blood flow to the heart and skeletal muscles. In addition, they dilate airways to the lungs and increase blood levels of glucose and fatty acids.

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