'fight' or 'flight'

The ‘fight or flight’ response is our body’s automatic, inborn response to danger which prepares the body to “fight” or  “flee” when faced with a perceived threat to our survival. It is a physiological response initiated by  the sympathetic nervous system which maximises our ability to survive by mobilising us to fight or flee.
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When our “fight or flight”response is activated, our body releases adrenaline , noradrenaline and cortisol (the ‘stress hormones’) into the bloodstream. These stress hormones cause a series of changes in the body, including:

Together, these physiological changes prepare our body to fight or flee in order to survive a dangerous situation.

These changes, in turn, can bring about additional changes in the body, such as reddening of the skin, dry mouth, difficulty speaking / shaky voice, “butterflies” in the stomach ( as a result of blood being diverted away from the digestive organs to the skeletal muscles) and sweating in the palms of the hands, soles of the feet and armpits.