Why Do We Get Nervous?

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Fidgety.Increased heart rate. Butterflies in your stomach. There’s no doubt about it: you’re nervous. Buy why?

It’s all part of the fight-or-flight response, which uses adrenaline to prime the human body for for stressful situations. In fact. the body reacts to danger on a sliding scale, though, so the stresses of a job interview illicit similar — but less severe — reactions to, say, a shark attack. This video explains how those nervous feelings come about — including the way redirection of blood from your stomach makes it feel all… funny. [ASAP Science]