fight or flight

acute adrenaline aggression aggressive alert anxiety anxious appetite attack battle behavior cortisol crisis danger dangerous dangers defense epinephrine escape estrogen event fast fawn fight fighting fish flee fleeing flight freeze harm harmful hazard hazardous hazards hormone hormones impulse impulsive insecurity lose menace menacing norepinephrine pain panic precarious reaction reflex reflexes response risk risks risky rush safe safety secure security shark stress survival survive testosterone threat threatening unsafe vulnerable win