试题与答案

有关血脑屏障的结构基础的描述错误的是()。 A.脑毛细血管的周围有一层胶质界膜,对大

题型:单项选择题 A1型题

题目:

有关血脑屏障的结构基础的描述错误的是()。

A.脑毛细血管的周围有一层胶质界膜,对大分子物质有屏障作用

B.脑毛细血管内皮的外面有一层连续的基膜,构成血脑屏障的第二道隔膜

C.脑毛细血管内皮细胞的质膜无窗孔,细胞间紧密连接连成一整体,内皮细胞间间隙直径小,只有小分子量的物质才有可能通过

D.脑毛细血管内皮细胞有吞饮小泡,具备主动转运高分子物质和低分子离子化合物的功能

E.脑毛细血管内皮细胞还具有嗜脂性,溶解于脂性物质中的物质易于通过血脑屏障,水溶性物质不易通过

答案:

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