In Robert Sapolsky's book "Why Zebras don't get ulcers" he describes both physical stressors and psychological stressors. The zebra experiences a physiological stress response to a physical stressor. A lion darts out from the tall grass and the zebra's heart rate and blood pressure spike in order to mobilize as much energy as possible to avoid becoming lunch.…
Kirk MorrisonNovember 30, 2018