Catecholamines from the adrenal medulla.
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   The  adrenal  medulla  mediates  short-term  responses  to  stress  by
   secreting epinephrine (adrenaline) and norepinephrine (noradrenaline).
<P>
   These  hormones  enable  a  rapid  (  fight-or-flight  )  responses by
   increasing blood glucose levels and blood pressure and directing blood
   to the heart, brain, and skeletal muscles.