What gets sent out to make your heart beat faster when you are scared?, A hormone called melatonin, A hormone called adrenaline, A hormone called insulin, What tells the adrenal glands to make adrenaline?, Your bones, Your stomach, Your brain and nerves, Why does your body calm down after the scary moment is over?, It never calms down?, Your brain sees there is no danger, so your body relaxes, Your heart decides by itself

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