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          author:comprehensive    Page View:9225
          Why do we gasp, jump and go pale when we're frightened? It all comes down to a tiny, almond-shaped structure in the brain that's called the amygdala. Matthew Orr, Alex Hogan/STAT

          It feels like your body reacts a million different ways when you get scared — the blood rushes out of your face, you jump, you gasp, your heart starts racing.

          But what’s happening inside your body that makes you feel afraid?

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          It all comes down to a tiny, almond-shaped structure in the brain that’s called the amygdala.

          It’s responsible for kickstarting your “startle response.” That sends out a distress signal to the hypothalamus, and from there, your brain makes the call between fight and flight.

          Learn more about the science of fear in the new episode of “Boddities.”

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          Watch other “Boddities” episodes:

          Related: Episode 5: Why do bright lights make us see spots?

          Related: Watch: Episode 4: Why do our ears pop?

          Related: Watch: Episode 3: Why doesn’t your stomach digest itself?

          Related: Watch: Episode 2: Why does it hurt to get water up your nose?

          Related: Watch: Episode 1: Does drinking soda help settle an upset stomach?

          comprehensive

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