Answer:
The sympathetic nervous system
Step-by-step explanation:
When human body is faced with a dangerous situation, it stops any reaction because of the fear and it has to choose between fight or flight, a very basic human instinct controlled by the amygdala. The amygdala switches on our sympathetic nervous system to gets the body ready for it. Some symptons of the activation of the sympathetic nervous system are: accelerate heartbeating, sweating, irregular breathing and adrenaline increasing.