下图表示细胞膜的亚显微结构,请据图回答下列问题:     (1)图中

下图表示细胞膜的亚显微结构,请据图回答下列问题:

 

 

(1)图中的A是________________,合成B的场所是____________。

(2)细胞膜的结构和生理特点分别是_____________和_____________。

(3)细胞膜的功能是______________和_____________________。

 

答案

(1)双层磷脂分子  核糖体    (2)具有一定的流动性    选择透过性    (3)保护细胞内部、控制物质进出细胞

 

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