A dog suddenly run out from the grasses besides the road. (The signals…
A dog suddenly run out from the grasses besides the road.
The signals from eyes and ears arrive at amydgala.
The signals arrive at hypothalamus.
Pituitary gland starts to release hormones to stimulate Adrenal glands.
The Adrenal glands release epinephrine and norepinephrine. These two hormones trigger the fight or flight response.
Epinephrine make the body more excited
prepare for movement
Heart rate increses
increase bold speed, bring more oxygen for use
get more lights to see things more clearly
more blood get into the skins and vessels
Norepinephrine make the body more calming
the eyes and ears get the information and sent them as action potential into the brain
neurontransmitters such as glutamate and acetylcholine are used to control the movement of body