Stress can generate multiple chain reactions. the body is prepared to either face a threat head-on or run away from it. this primal survival skill is called the response. once the brain perceives something to be a , the system signals the release of stress hormones like from the adrenal glands. during the alarm phase, some systems are more alert in order to prepare the body for action. for example, sharpens, rate increases, pressure rises, and clotting ability increases. at the same time, the digestive and systems slow as blood is diverted to more critical areas. prolonged stress can diminish the quality of your life. stress can have manifestations like tension headaches, indigestion, and hair loss. stress can also have effects like depression and anxiety.