The expression of stress is a natural response of the body to inputs from the outside world, and it requires the mobilization of both physical and mental resources. Whenever we are confronted with circumstances that we consider to be dangerous or that demand our full attention, we experience this phenomenon.
In response to stress, the body goes through a number of intricate biochemical processes. Cortisol and adrenaline are the stress hormones that play the most important function in this process. Adrenaline is created by the adrenal medulla, which reaches the bloodstream in a short amount of time. It provides instant mobilization of the body, which manifests itself in a quickening of the heartbeat, an increase in blood pressure, an increase in blood flow to the muscles, and heightened sensitivity to the senses.