V2EX outer membrane

Outer Membrane

Definition / 定义

外膜:生物学中指细胞或细胞器最外层的膜结构,起到分隔、保护与选择性运输等作用。常见于革兰氏阴性菌的细胞包膜(位于细胞壁外侧),也可指线粒体外膜叶绿体外膜等结构。(在不同语境下,具体所指可能不同。)

Pronunciation / 发音

/atr mmbren/

Examples / 例句

The antibiotic cannot easily cross the outer membrane.
这种抗生素不容易穿过外膜。

In Gram-negative bacteria, the outer membrane contains lipopolysaccharides that help protect the cell from toxic substances and some drugs.
在革兰氏阴性菌中,外膜含有脂多糖,有助于保护细胞免受有毒物质和某些药物的侵害。

Etymology / 词源

outer 来自古英语 ūtera,意为“更外面的、外部的”;membrane 源自拉丁语 membrāna,与“肢体/器官(member)”同源,原指“薄皮、薄层”。组合成 outer membrane,字面即“外面的薄膜/膜层”,在现代科学语境中特指生物结构的外层膜。

Related Words / 相关词

Literary Works / 文学作品

  • Molecular Biology of the Cell(《细胞的分子生物学》)
  • Lehninger Principles of Biochemistry(《莱宁格生物化学原理》)
  • Campbell Biology(《坎贝尔生物学》)
  • Brock Biology of Microorganisms(《布洛克微生物学》)
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