stress response system

adrenal adrenalin adrenaline anatomy axis biology blood body brain care catecholamine catecholamines chemical chemistry concentration cortex cortisol decreased diabetes diagram digestive dilation dopamine education educational endocrine epinephrine fightorflight function gland glands glucose glycogen health heart high hormone hormones human hypothalamic hypothalamus illustration immune life liver lungs medical medicine metabolism norepinephrine occurs organ physiological pituitary reaction response science scientific secrete signaling steroid stress structure system that threat use vector