细胞内膜(internal membrane)又称为胞质膜（cytoplasmic membrane ），存在于真核细胞质中各膜结合细胞器中的膜，包括核膜、内质网膜、高尔基体膜、溶酶体膜、线粒体膜、叶绿体膜、过氧化物酶体膜等。由于细菌没有内膜，所以细菌的细胞质膜代行胞质膜的作用。
肌浆网属于细胞内膜系统。
The sarcoplasmic reticulum is a system of intracellular membranes.
而细胞内膜受体G蛋白偶联的环磷腺苷浓度促进了细胞的各种功能，也参与调节了其他信号通路。
The concentration of adenosine cyclophosphate of membrane receptor G protein couple stimulates the functions of cells, and participates in regulating various signal transductions.
突变体在毒素作用下，具有较强的防御酶活性，而细胞内膜系统破坏较小则是产生较强抗性的原因。
The mutant under the action of toxin has the ability to increase the defensive enzyme activity and to reduce the damage of cell membrane system that would result in resistance increasing.
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