| 词汇 | norepinephrine |
| 释义 | norepinephrine noun[ U ] chemistry, biology, medical specializeduk /ˌnɔː.rep.iˈnef.rɪn/ us /ˌnɔːr.ep.ɪˈnef.rɪn/ a hormone that helps keep blood pressure at a constant level, especially if it falls too low去甲肾上腺素 Substances & structures in the body abductor accessorius ACL actin adductor fundus funiculus fusiform glomerular glomerulus myosin navicular neuroendocrine neurohormonal neurohormone tendinous tendinum tendo tensor Th Examples of norepinephrinenorepinephrine It is unclear where on the norepinephrine dose-response curve the level of active tone was set. The contraction responses to norepinephrine increase in some arteries and decrease in others during pregnancy. Even in humans, blocking norepinephrine reduces the memory enhancing effects of surprise. Prior exposure to chronic stress results in enhanced synthesis and release of hippocampal norepinephrine in response to a novel stressor. These overall effects were reversible, as the frequency of oscillation returned to baseline during washout of norepinephrine. One involves primarily the norepinephrine system projecting from the locus coeruleus to the prefrontal and posterior cortex and hippocampus. The effect of norepinephrine on blood flow throught the fetal liver and ductus venosus. However, cyclooxygenase inhibition had no effect on the norepinephrine contraction responses. A neuroscience account of aversive conditioning might refer to the amygdala and temporal cortex and perhaps the role of neurotransmitters such as norepinephrine. The norepinephrine and serotonin systems spread throughout the brain, while dopamine circuits are more specifically targeted. The results obtained suggest that noradrenaline (norepinephrine) could be one of the factors responsible for the metabolic behaviour that characterises cytoplasmically immature oocytes. Although both methylphenidate and amphetamines inhibit reuptake of dopamine and norepinephrine, only amphetamines also promote release of those neurotransmitters. As a result, responsive to norepinephrine than arteries from denuded arteries from pregnant animals are more nonpregnant animals. Low electrodermal activity is also assumed to reflect a pathway from low norepinephrine and low serotonin to brain functioning. Both animals had been delivered by caesarean section and were recently exposed to such potent vasoactive substances as oxytocin, ergonovine, and norepinephrine. See all examples of norepinephrine These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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