noradrenalin
Fight-or-flight chemical
Noradrenalin is a hormone and neurotransmitter that prepares the body for action during stress or danger.
Released by the adrenal glands and nerve endings, it increases heart rate, blood pressure, and alertness—part of the "fight or flight" response.
Also called norepinephrine, especially in American medical usage.
Tyrosine-derived signaling molecule
- neurotransmitterSynaptic chemical messenger
- epinephrineAdrenal stress hormone
- dopamineReward-linked neural messenger
- tyrosineProtein-building amino acid
receptor · biosynthesis · medulla · sympathetic · beta-blocker · vasoconstriction · synapse · vesicle
Focused mental awareness
- focusConcentrated attention point
- wakefulnessState of being conscious
- concentrationSustained single-minded attention
- vigilanceState of keen awareness
arousal · awareness · clarity · acuity · sharpness · responsiveness · readiness · perception
Acute threat reaction
- anxietyPersistent apprehensive distress
- panicUncontrollable sudden fear
- tensionStretched or strained state
- fearEmotional response to threat
alarm · distress · cortisol · hyperarousal · startle · threat · danger · emergency
Setting into operation
- stimulationEvoking a response
- energyPower to do work
- excitationStimulation of response
- intensityStrength or force level
invigoration · heightened · surge · rush · jolt · spike · boost · mobilization
Arterial walls contracting inward
- sweatingMoisture through pores
- tremorInvoluntary rhythmic shaking
- pallorUnhealthy facial whiteness
- bronchodilationWidening of air passages
metabolism · glucose · circulation · respiration · tachycardia · palpitations · goosebumps
catecholamine
Tyrosine-derived signaling molecule
- neurotransmitterSynaptic chemical messenger
- epinephrineAdrenal stress hormone
- dopamineReward-linked neural messenger
tyrosine · receptor · biosynthesis · medulla · sympathetic · beta-blocker · vasoconstriction · synapse · vesicle · reuptake
attention
Focused mental awareness
- focusConcentrated attention point
- wakefulnessState of being conscious
- concentrationSustained single-minded attention
vigilance · arousal · awareness · clarity · acuity · sharpness · responsiveness · readiness · perception · cognition
fight-or-flight
Acute threat reaction
- anxietyPersistent apprehensive distress
- panicUncontrollable sudden fear
- tensionStretched or strained state
fear · alarm · distress · cortisol · hyperarousal · startle · threat · danger · emergency · crisis
activation
Setting into operation
- stimulationEvoking a response
- energyPower to do work
- excitationStimulation of response
intensity · invigoration · heightened · surge · rush · jolt · spike · boost · mobilization · dynamism
vasoconstriction
Arterial walls contracting inward
bronchodilation · metabolism · glucose · circulation · respiration · tachycardia · palpitations · goosebumps
noradrenalinsedative
Drug promoting calm
acetylcholine · tranquilizer · GABA · melatonin · depressant
noradrenalinacetylcholine
Neurotransmitter for muscles and memory
parasympathomimetic · cholinergic · beta-blocker · rest and digest · alpha-blocker