Answer:
The fight or flight response is a physiological reaction as a response to events that could attack our survival.
Step-by-step explanation:
Walter Bradford Cannon was the first person who described the term. His theory was related to animals and he established that animals reacted to attacks through the use of the sympathetic nervous system, which prepared them to fight or to escape.
There are some physiological changes with the existence of the fight or flight response. These changes' function is to give the body the necessary strength as well as speed to decide on fighting or escaping. These changes include the increasing in blood flow and blood pressure as well as the increasing of muscle tension.