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英语翻译The movement of solutes across the BBB iseither passive,

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英语翻译
The movement of solutes across the BBB is
either passive,driven by a concentration gradient from plasma to brain,with
more lipid-soluble substances entering most easily,or may be facilitated by
passive or active transporters in the endothelial cell membranes.Efflux
transporters in the endothelium limit the CNS penetration of a wide variety of
solutes.
翻译好的追加分!
溶质进入血脑屏障有两种方式:一种是被动的,取决于血浆到大脑的浓度差,此时脂溶性物质更易进入血脑屏障;二是被血管内皮细胞膜内的被动或主动的转运蛋白运输.此时转运蛋白从内皮细胞内流出,限制了大量溶质进入中枢神经.