11．皮質(zhì)腎單位的主要功能是(      )

A.尿的生成、釋放腎素                                    B.分泌醛固酮

C.釋放抗利尿激素                                           D.尿的濃縮和稀釋

12．腎小管和集合管不分泌的物質(zhì)是(      )

A.H⁺                                                                 B.K⁺                            

C.Na⁺                                                               D.NH₃

13．婦女輸卵管結(jié)扎后(      )

A.仍排卵、無月經(jīng)                                           B.仍排卵、有月經(jīng)

C.不排卵、無月經(jīng)                                           D.不排卵、有月經(jīng)

14．子宮內(nèi)膜呈分泌期增生主要受哪些激素的作用?(      )

A.雌激素                                                         B.孕激素

C.卵泡刺激素                                                  D.雌激素、孕激素

15．神經(jīng)垂體釋放的激素是(      )

A.生長素、催乳素                                           B.催乳素、催產(chǎn)素

C.抗利尿激素、催產(chǎn)素                                    D.抗利尿激素、催乳素

16．受意識支配的肌肉組織是(      )

A.骨骼肌                                                         B.普通心肌

C.平滑肌                                                         D.特殊心肌

17．生物體中重要的遺傳物質(zhì)是(      )

A.氨基酸                                                         B.蛋白質(zhì)                     

C.核酸                                                             D.酶原

18．上皮組織的營養(yǎng)主要由(      )

A.血管直接供應(yīng)                                               B.上皮游離面吸收

C.神經(jīng)末梢營養(yǎng)                                               D.深層結(jié)締組織血管供應(yīng)

19．構(gòu)成細胞膜基本骨架的化學(xué)物質(zhì)是(      )

A.類脂                                                             B.多糖                        

C.蛋白質(zhì)                                                         D.核酸

20．正常男性染色體核型描述為(      )

A.46，XX                                                        B.46，XY                    

C.46，YY                                                        D.44，XY