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Biology

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Biology

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Cell Structure and Function

Cell Organelles and Microenvironments

Description

Eukaryotic cells use membrane-bound organelles to keep cell processes organized. The nucleus and mitochondria are two key examples. Because biological membranes are selectively permeable, they create controlled spaces inside each organelle. These small microenvironments support specialized jobs and separate them from the sur...

Transcript

真核细胞

含有许多细胞区室

膜结合细胞器只允许

特定功能在微环境中

发挥作用

保护其不受细胞质内环境

和细胞外环境的影响

例如 细胞核要求控制条件下

使其内部的基因进行精准调节

因此 它被双层膜包围

细胞核被膜带有核孔

核孔可以控制分子的进出 例如信使核糖核酸

此外 一些蛋白质需要氧化环境

且必须与还原性的细胞质体隔离

因此 核糖体在内质网中

生产这些蛋白质

同时在内质网...

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