List the stages of the general adaptation syndrome and discuss what happens in each stage. Identify who first came up with this model.
What will be an ideal response?
Hans Selye was the endocrinologist who first identified the general adaptation syndrome, or the GAS.The first stage, alarm reaction, involves a fight-or-flight response when a stressor is first recognized to be occurring. The sympathetic nervous system activates, causing a fast and intense increase in our stress-fighting resources. A variety of physical changes occur, as noted in Figure 10.3, but the alarm reaction stage is a rather brief period in the GAS.The second stage, resistance, sees the body "settle in" for the longer fight of ongoing stress. The immediate changes of the Alarm reaction stage fade, and the body works to cope with stress over an extended period.The third stage, exhaustion, is best thought of as running out of gas, inasmuch as we can no longer effectively fight the physical effects of stress. Physical wear and tear becomes obvious, and the individual may begin to demonstrate signs of physical illness. In extreme cases, exhaustion in the GAS can lead to death.
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