wo systems work together and trigger four mind-body changes to prepare the person for fight or flee:
. The redirection of the blood to the brain and large-muscle groups and away from the skin, internal organs, and extremities. p align="justify">. Increased alertness by way of improved vision, hearing, and other sensory processes through the activation of the brainstem. p align="justify">. The release of glucose (blood sugar) and fatty acids into the bloodstream to sustain the body during th e stressful event. p align="justify">. Depression of the immune system, as well as restorative and emergent processes (such as digestion). Set of four changes shifts the person from a neutral, or naturally defensive, posture to an offensive posture. br/>
