Final answer:
The fight-or-flight response is a physiological reaction that prepares the body for action in response to stressors such as perceived danger.
Explanation:
Fight-or-flight response is a physiological reaction that occurs in response to stressors, such as perceived danger. This response is mediated by both the nervous and endocrine systems, with hormones being released to prepare the body for action.
When a threat is perceived, the sympathetic nervous system stimulates an increase in energy levels through mechanisms like increased blood glucose levels. This allows the body to either fight for survival or flee from danger, demonstrating the evolutionary adaptation of this response.
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