adrenaline

a very important HORMONE produced by the MEDULLA of the ADRENAL GLANDS , which, when released, prepares the body for 'fright, flight or fight' by increasing the depth and rate of RESPIRATION , raising the heartbeat rate and improving MUSCLE performance. It also has an inhibitive effect on the processes of DIGESTION and EXCRETION . It can be used medically in a variety of ways, for instance in the treatment of bronchial ASTHMA , where it relaxes the airways, and also to stimulate the heart when there is cardiac arrest. see ADDISON'S DISEASE .