11.發(fā)自骶叢的神經(jīng)是（       ）

A.腋神經(jīng)                                                    B.坐骨神經(jīng)

C.閉孔神經(jīng)                                                 D.股神經(jīng)

12.關(guān)于脊髓的結(jié)構(gòu)（       ）

A.中央管與第四腦室不連續(xù)                        B.前角是運(yùn)動(dòng)神經(jīng)元胞體集中處

C.胸腰段灰質(zhì)沒有側(cè)角                               D.胸段有膨大

13.視網(wǎng)膜內(nèi)能感受強(qiáng)光并辨別顏色的細(xì)胞是（       ）

A.視錐細(xì)胞                                                 B.視桿細(xì)胞

C.雙極細(xì)胞                                                 D.節(jié)細(xì)胞

14.成人生長(zhǎng)激素分泌過多可引起（       ）

A.肢端肥大癥                                             B.粘液性水腫

C.侏儒癥                                                    D.巨人癥

15.肺動(dòng)脈（       ）

A.共有4條                                                 B.可將右心室的血送至肺

C.其內(nèi)血液含氧較多                                   D.是肺的營(yíng)養(yǎng)性血管