An emergency reaction when dealing with a threat often includes sympathetic nervous system arousal and the mobilization of one's energy. this is best illustrated by

An emergency reaction when dealing with a threat often includes sympathetic nervous system arousal and the mobilization of one's energy. this is best illustrated by - the fight or flight response.

A fight or flight response, also called hyper arousal is a physiological reaction which occurs in response to a perceived harmful event, attack, or threat to survival.

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.