Body's response to stress

Acute Stress

________________________________________________________________________
Hypothalamus > Sympathetic branch > Adrenal medulla > Adrenaline or Noradrenaline 
________________________________________________________________________

The hypothalamus triggers activity within the sympathetic branch of the ANS(autonomic nervous system). The sympathetic nervous system then stimulates the Adrenal glands, in particular the Adrenal Medulla, this in turn, releases adrenaline or noradrenaline, for the fight or flight response. 
________________________________________________________________________

Affect the body by:
Blood pressure+Heart rate: both increase
Digestion decreases: blood directed to muscles and heart  
Sweating: increases
Muscles: become more tense 

These changes resut in the body being ready to Use energy to deal with the stressful situation.

Chronic Stress

________________________________________________________________________
Hypothalamus > CRH > Pituitary gland > ACTH > Adrenal cortex > Corticosteroids
________________________________________________________________________

The hypothalamus triggers the release of CRH, this CRH then stimulates the pituitary gland. Which leads to the release of ACTH, which travels though the body and stimulates the adrenal cortex. Corticosteroids are then released into the bloodstream
________________________________________________________________________

Corticosteroids produce energy by converting protein and fats into energy.