After an adrenaline rush, why do humans experience a sudden severe drop in energy? Would this not be disadvantageous for primitive survival?
In: Biology
Ely actually 5:
There are two one-way highways of nerves in your body (sympathetic and parasympathetic). When a big, scary monster comes, tons of chemicals like adrenaline go down the first highway. This helps you run away or beat up the bad guy.
But after that’s done, the chemicals can’t go backwards on the highway. So the second highway sends a bunch of different chemicals like noradrenaline (inventive, right?) which help make the body normal again. Since you can only add to the situation, usually the second highway needs to flood the adrenaline with a counterpart so your body doesn’t burn itself out. That’s the noradrenaline that makes you sleepy.
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