11．皮质肾单位的主要功能是(      )

A.尿的生成、释放肾素                                    B.分泌醛固酮

C.释放抗利尿激素                                           D.尿的浓缩和稀释

12．肾小管和集合管不分泌的物质是(      )

A.H+                                                                 B.K+                            

C.Na+                                                               D.NH3

13．妇女输卵管结扎后(      )

A.仍排卵、无月经                                           B.仍排卵、有月经

C.不排卵、无月经                                           D.不排卵、有月经

14．子宫内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．神经垂体释放的激素是(      )

A.生长素、催乳素                                           B.催乳素、催产素

C.抗利尿激素、催产素                                    D.抗利尿激素、催乳素

16．受意识支配的肌肉组织是(      )

A.骨骼肌                                                         B.普通心肌

C.平滑肌                                                         D.特殊心肌

17．生物体中重要的遗传物质是(      )

A.氨基酸                                                         B.蛋白质                     

C.核酸                                                             D.酶原

18．上皮组织的营养主要由(      )

A.血管直接供应                                               B.上皮游离面吸收

C.神经末梢营养                                               D.深层结缔组织血管供应

19．构成细胞膜基本骨架的化学物质是(      )

A.类脂                                                             B.多糖                        

C.蛋白质                                                         D.核酸

20．正常男性染色体核型描述为(      )

A.46，XX                                                        B.46，XY                    

C.46，YY                                                        D.44，XY