41. Genes controlling the hormone norepinephrine make the heart pump more blood, Liggett knew. 42. Patients with BFT were found to have increased plasma epinephrine, but not norepinephrine . 43. Elevated brain levels of norepinephrine and dopamine are thought to have an antidepressant effect. 44. This results in diminished dopamine and norepinephrine synthesis. 45. Hyperresponsiveness in the norepinephrine system can be caused by continued exposure to high stress. 46. Sympathetic stimulation results in the release of norepinephrine . 47. Inhibitory effects on 5-HT, norepinephrine , and dopamine transporters are weak. 48. Clinical dosages inhibit both norepinephrine and serotonin transporters. 49. Modern catheters have multiple norepinephrine or even atropine. 50. The sympathetic influence on heart rate is mediated by release of epinephrine and norepinephrine .
