Adrenergic

Communication between the nerves and muscles that uses epinephrine as the 'messenger'. Adrenergic stimulation is what is involved in the 'flight or fight' response, which means the body is alerted to a danger of some sort and prepares to basically run or fight. Adrenergic stimulation results in an increased heart rate, sweating, and increased blood pressure. Drugs that mimic the action of the sympathetic nervous system.