ANATOMY

Detailed explanation-1: -Your sympathetic nervous system is best known for its role in responding to dangerous or stressful situations. In these situations, your sympathetic nervous system activates to speed up your heart rate, deliver more blood to areas of your body that need more oxygen or other responses to help your get out of danger.

Detailed explanation-2: -After the amygdala sends a distress signal, the hypothalamus activates the sympathetic nervous system by sending signals through the autonomic nerves to the adrenal glands. These glands respond by pumping the hormone epinephrine (also known as adrenaline) into the bloodstream.

Detailed explanation-3: -Your sympathetic nervous system is responsible for how your body reacts to danger and is responsible for the fight-or-flight response.

Detailed explanation-4: -This chain of reactions results in an increased heart rate, blood pressure, and breathing rate. 3 Your body can stay in fight-or-flight for 20 to 60 minutes after the threat is gone, which is how long it takes for the parasympathetic nervous system to return it to pre-arousal levels.