A.傳導(dǎo)神經(jīng)沖動(dòng) B.支持、營(yíng)養(yǎng)和保護(hù)神經(jīng)細(xì)胞 C.釋放神經(jīng)遞質(zhì) D.產(chǎn)生神經(jīng)纖維 E.分泌腦脊液