It’s part of something called the “Fight or Flight” process. When you are scared by something, there are two things you can do about it – attack it to scare it off (“fight”), or you can run away from it (“flight”). Your body reacts by releasing adrenaline into your system, which increases your breathing rate, heart rate and causes your pupils to dilate, among other things. This means that you are better prepared to deal with the thing making you scared – in particular, the increased breathing rates will deliver more oxygen to your muscles, making it easier for you to get away if you need to.
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kamilo12 commented on :
That is clever.