We have evolved mentally and physically. We have not evolved .

In times of stress we still experience the or response. The stress response has 2 phases as part of the process:

The nervous system (SNS) is one of the two main divisions of the nervous system, the other being the nervous system.

The autonomic nervous system functions to regulate the body’s actions.

The sympathetic nervous system’s primary process is to stimulate the body’s .

It is, however, constantly active at a basic level to maintain homeostasis. The sympathetic nervous system is to the parasympathetic nervous system which stimulates the body to “feed and breed” and to (then) “rest-and-digest”.