Stress hormones such as cortisol and norepinephrine are released at periods of high stress. The hormone regulating system is know as the endocrine system. Cortisol is believed to affect the metabolic system and norepinephrine is believed to play a role in ADHD Cortisol is a corticosteroid hormone that is involved in the response to stress; it increases blood pressure and blood sugar levels and suppresses the immune system. ... Norepinephrine or noradrenaline is a catecholamine and a phenethylamine with chemical formula C8H11NO3. ... Major endocrine glands. ... DISCLAIMER Please remember that Wikipedia is offered for informational use only. ...