| 21. | In the brain, it is the principal norepinephrine metabolite.
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| 22. | It says that norepinephrine is both a stress hormone and a neurotransmitter.
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| 23. | Low levels of norepinephrine cause an increase in reward dependence.
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| 24. | It acts as a norepinephrine-dopamine reuptake inhibitor ( NDRI ).
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| 25. | MRAs act to varying extents on serotonin, norepinephrine, and dopamine.
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| 26. | Some antidepressants work by blocking the reuptake of norepinephrine.
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| 27. | However, norepinephrine reuptake became associated with stimulating effects.
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| 28. | The human serotonin transporter and norepinephrine transporter do not contain zinc binding sites.
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| 29. | The similarly neuromelanin-pigmented cell bodies of the locus ceruleus produce norepinephrine.
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| 30. | In vertebrates, melatonin secretion is regulated by norepinephrine.
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