furthered Cannon’s work by defining stress as the "rate of wear and tear on the body" and stressors as the "causative agents of stress" (1956). Selye found that stressors may be physical, such as infection, injury, and pain, or may be psychological, such as fear, anger, and sadness. He identified what he called a general adaptation syndrome (GAS), whereby the body seeks to maintain homeostasis or balance - See more at: http://www.nursetogether.com/stress-management-for-nurses#sthash.B3C1pIYo.dpuf