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(ˌnɔːrəˈdrɛnəlɪn; -ˌliːn) or


(Biochemistry) a hormone secreted by the adrenal medulla, increasing blood pressure and heart rate, and by the endings of sympathetic nerves, when it acts as a neurotransmitter both centrally and peripherally. Formula: C8H11NO3. US name: norepinephrine


(ˌnɔr ɛp əˈnɛf rɪn, -rin)

a neurotransmitter that is similar to epinephrine, acts to constrict blood vessels and dilate bronchi, used esp. in medical emergencies to raise blood pressure.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.noradrenaline - a catecholamine precursor of epinephrine that is secreted by the adrenal medulla and also released at synapses
pressor, vasoconstrictive, vasoconstrictor - any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure
monoamine neurotransmitter - a monoamine that is functionally important in neural transmission
catecholamine - any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland
References in periodicals archive ?
Determination of biogenic amines (dopamine, noradrenaline and serotonin) was realized by fluorometric technique with application of spectrophotometer MPF-4 (Hitachi, Japan).
Today although serotonin and noradrenaline stand in the forefront of the biological basis of depression, recent studies make us think that dopamine plays a prominent role in the biological mechanism of depression and the efficacy of antidepressant treatments (14).
The phasic tension was measured as the peak contraction generated by noradrenaline, 10-15 s after agonist application; the tonic response was measured as the tension induced by NA, 15 min after agonist application.
But the hearing was told it was standard practice to administer 1mg of noradrenaline an hour until the affects of sedation had been combated.
Current antidepressant drug therapies include selective serotonin reuptake inhibitors, serotonin and noradrenaline reuptake inhibitors and the older, less specific monoamine regulating drugs.
Our bodies, science tells us, experience a number of physical and psychological changes when under stress: an increase in heart rate and blood pressureI3/4 rapid, shallow breathingI3/4 tense musclesI3/4 fats released into the bloodstream along with hormones like adrenaline, noradrenaline, and cortisolI3/4 and the humoral arm of our immune system ceases working, among other reactions.
Caffeine not only stimulates the central nervous system but may act as a mild anti-depressant by boosting production of certain neurotransmitters in the brain, including serotonin, dopamine and noradrenaline, Lucas said.
The paper also suggests the action of noradrenaline, a hormone released by the mid-brain, can evoke positive emotions, hallucinations and other features of the near-death experience.
Caffeine stimulates the central nervous system and acts as a mild antidepressant by boosting production of specific neurotransmitters in the brain, including serotonin, dopamine and noradrenaline.
5 to 7 (2) and has been shown to decrease plasma noradrenaline levels (3).
It has been reported that walking in forest environments significantly enhances human immune function, reduces the levels of stress hormones such as urinary adrenaline and noradrenaline, and increases the score for vigor and decreased the scores for anxiety, depression, fatigue, confusion and anger on the Profile of Mood States (POMS) test.
More studies are needed to know exactly how Ritalin, which boosts levels of dopamine and another chemical called noradrenaline in the brain, influences risky behavior.

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