| 单词 | norepinephrine | 
| 释义 | norepinephrine [´nȯr·ep·ǝ`ne·frǝn]  BIOCHEMISTRY C8H11O3N A hormone produced by chromaffin cells of the adrenal medulla; acts as a vasoconstrictor and mediates transmission of sympathetic nerve impulses. Also known as noradrenaline.  | 
	
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