Stress and Health Sciences

摘要

A stimulus to a living body is called a stressor, and a nonspecific reaction of a living body caused by the stimulus is called a stress. Stress is always occurring because many routine factors such as temperature change, human relations, work and so on are stressors. In other words, it is no exaggeration to call living itself a stress. You should not think this in a bad way. It can be said that life is fun because there is stress. Working towards dreams and loving a person may be a stressor, but also the significance of living. Whatever the stressor, the responses occurring in vivo are common, which is mainly the excitement of both the sympathetic nervous function and the hypothalamus-pituitary-adrenal axis. Stress responses are essentially a state prepared for fighting and it was necessary to survive in the history of mankind. Because brains and muscles are important to fight, living organisms raise blood pressure and blood glucose to send nutrition and oxygen to them. On the other hand, the blood flow to the internal organs is reduced.