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DeadlyProtocols t1_ja96t4v wrote

Reply to comment by BaconReceptacle in ELI5: Why do we take that deep, involuntary breath when idle out of nowhere? by respectcrazy

Interesting, so I wonder if it’s like a pre-fight or flight deal. Your body anticipates a need for rapid breathing so it is planning ahead.

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BaconReceptacle t1_ja98asp wrote

I think it's natural selection. We evolved with alveoli as the gas exchange mechanism in our lungs. If you didnt have the genetic code for this automatic response, you didnt have as many offspring.

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