V2EX urea cycle

Urea Cycle

释义 Definition

尿素循环(又称“鸟氨酸循环”):人体(主要在肝脏)将有毒的氨(ammonia)转化为相对无毒、可经尿液排出的尿素(urea)的一系列生化反应途径,用于清除氮代谢产生的含氮废物。

发音 Pronunciation (IPA)

/jri sakl/

例句 Examples

The urea cycle helps the body remove excess nitrogen.
尿素循环帮助身体清除多余的氮。

When the urea cycle is impaired, ammonia can build up in the blood and cause serious neurological symptoms.
当尿素循环受损时,氨可能在血液中积累,并引发严重的神经系统症状。

词源 Etymology

urea 来自法语 urée,与“尿(urine)”同源,指尿中的主要含氮代谢产物;cycle 源自希腊语 kyklos(“环、循环”)。合起来表示“把氮废物转成尿素的循环过程”。该途径常被称为 ornithine cycle(鸟氨酸循环),因为鸟氨酸在反应中被不断再生、循环使用。

相关词 Related Words

文学与作品中的用例 Literary & Notable Works

  • Lehninger Principles of Biochemistry(《雷宁格生物化学原理》)
  • Harper’s Illustrated Biochemistry(《哈珀图解生物化学》)
  • Campbell Biology(《坎贝尔生物学》)
  • Molecular Biology of the Cell(《细胞的分子生物学》)
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