Thursday, November 11, 2010


36 有關腦室和中央管內襯細胞之敘述,下列何者錯誤?
它是室管膜細胞 其游離面有纖毛和微絨毛
其底部位於基底膜上 是一種神經膠細胞

其底部位於基底膜上 this is the wrong answer

腦室: ventricle
中央管內襯細胞: ependymal cells
神經膠細胞: glial cells

脊髓神經組織可區分為由神經細胞組成H形的灰質 ( gray matter ) 及在灰質周圍由神經纖維所組成的白質 ( white matter )。 灰質的左右兩部份各由前角( anterior horn )及後角 ( posterior horn ) 構成,在脊髓的腹面有前中裂 ( anterior fissure ) 陷入,脊髓中央之管狀構造稱中央管 ( central canal ),為胚胎時期之神經管遺跡,中央管之管壁為單層立方至柱狀之室管膜細胞 ( ependymal cell ) 所覆蓋,室管膜細胞有纖毛、可協助腦脊髓液 ( cerebrospinal fluid ) 在中央管之運送。自左右兩側的神經衝動要傳到異側,必需經過中央管前後之中央灰質連合 ( central gray commissure )。

SEpendymal cells

Ependymal cells, also named ependymocytes, line the cavities of the CNS and make up the walls of the ventricles. These cells create and secrete cerebrospinal fluid(CSF) and beat their cilia to help circulate that CSF and make up the Blood-CSF barrier. They are also thought to act as neural stem cells[7].

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