When we experience an unexpected event,such as hearing a sudden loud sound,our sympathetic nervous system causes the adrenal glands to release the stress hormones epinephrine (adrenaline)and norepinephrine (noradrenaline),which stimulates behavior.This reaction is known as:

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The fight-or-flight response is the body's physiological reaction to an unexpected event, which is triggered by the release of stress hormones from the adrenal glands. This response prepares the body to either fight or flee from the perceived threat.

When We Experience an Unexpected Event,such as Hearing a Sudden