The momenta of individual objects changes. The total momentum remains constant. I have to disagree. If you have two cars that collide head on, the momentum of both vehicles stops. The ENERGY created by the impact causes usually, some reverse momentum but the momentum is lost.
As the SNS continues to trigger physical reactions, it causes a wear-and-tear on the body. It's not so much what chronic stress does to the nervous system, but what continuous activation of the nervous system does to other bodily systems that become problematic.
all becoming more aware of how stress affects our lives. The sympathetic nervous systemenforces stress on the body: it causes our hearts to pound, our blood pressure to soar, and adrenaline to flood our system. In a sympathetic response our muscles tense up for running or fighting. We get a dry mouth and an upset stomach. In short, we direct