问题 填空题

如图为尿液形成过程示意图.

(1)写出图中所示结构的名称:a______ b______ c______

(2)当血液流经a时,血浆中的大部分水、无机盐、葡萄糖及尿素等物质过滤到b中形成______.

(3)图中c 处的几个向上的箭头的含义是原尿中有用成分重吸收回血液,没有被重吸收进入血液中的液体流到f管中就形成了______.

答案

(1)从图中可以看出:a是肾小球,b是肾小囊;c是肾小管.

(2)尿的形成过程是:尿的形成包括a肾小球和肾小囊壁的滤过和c肾小管的重吸收作用,血液流经a肾小球时,除了血细胞和大分子的蛋白质外,其他的如水、无机盐、尿素、葡萄糖会滤过到b肾小囊腔形成原尿;

(3)当原尿流经C肾小管时,其中大部分水、部分无机盐和全部的葡萄糖被重新吸收回血液,而剩下的如尿素、一部分无机盐和水等由肾小管流出形成尿液.

若尿液中出现了葡萄糖,说明肾小管的重吸收作用发生了病变或者此人的胰岛素分泌不足,因为胰岛素可以调节糖的代谢.

故答案为:

(1)肾小球;肾小囊;肾小管

(2)原尿

(3)尿液

单项选择题
阅读理解

D

Mike Ingrarn had been a guard the Ohio State football team in the late 1950s.I believe he may have been captain in his senior year.He is a tough - looking guy,a hero in Columbus,a brave fighter in a red—and—gray uniform.  

One holiday season Jack and I had been at the F&R Lazarus department store downtown, and we saw,carrying a tall pile of boxes,someone who clearly was working in the Lazarus stockroom(仓库).It was, Mike Ingram,post—Ohio state football player.

We stared—how could we help it? And Mike Ingram stopped in his track,looked right back at us,and said,with bite in his tone:“Yeah,it's me.”Meaning:Go ahead and stare if you must.

Couldn’t really blame him.There was nothing wrong with what he was doing——be was earning some money in the stockroom.But he was out in the world now, he wasn't where he had been when everything was bathed in sunlight;he was in Ohio Stadium,hearing the supporting shouts from 78,000 people who loved him and his teammates.He had moved past that trust of life’s roles,as everyone does.It was his misfortune to have,been famous very early;there must have been dozens and dozens of men in their twenties working in the Lazarus stockroom that holiday season,but Mike Ingram was the one sure to attract cnrious passers,because he was no longer who he was supposed to be.

68.When the writer met him in Lazarus,Mike was a           .

A.salesman             B.manager             C.1aborer           D.customer

69.By saying“how could we help it?”the writer means that          

A.he and his friend just can’t force themselves not to look at Mike

B.he wonders whether he and his friend can help Mike

C.he and his friend can’t stop looking at each other

D.he and his friend can do nothing to stop Mike carrying the boxes

70.Which of the following is NOT true according to the passage?

A.Mike used to be very popular when he played in the Ohio State football team.

B.Many other people would stare at Mike like the writer when they run into him.

C.Working as an ordinary worker,according to the writer,is Mike’s misfortune.

D.Some people accept what life gives them.

71.We can infer from the passage that when Mike was stared at,he looked           .

A.nice                   B.worried                     C.shy                 D.unhappy