问题 单项选择题 A型题

肾小管和集合管的分泌功能描述错误的是()。

A.K+主要由远曲小管和集合管分泌

B.K+的分泌与Na+的主动重吸收密切相关

C.除髓袢细段外,各段肾小管集合部都可分泌H+

D.H+的分泌以H+-Na+交换的方式进行

E.在远曲小管和集合管,K+-Na+交换和H+-Na+交换之间无竞争性抑制作用

答案

参考答案:E

解析:影响肾小球滤过率的因素有:滤过膜的通透性和滤过面积、肾血浆流量的改变、有效滤过压的改变。当血压低于80mmHg时,肾毛细血管血压降低,有效滤过压减小,滤过率减小,尿量减少。

阅读理解

The French spend more time sleeping and eating than anyone else among the world's rich people, according to a survey.

The average French person sleeps almost nine hours every night, more than an hour longer than the average Japanese and Korean, who sleep the least in a survey.

And while more and more French people have meals at fast food restaurants, they still spend more than two hours a day eating.

That means their meals are twice as long as those of the average Mexican, who spends just over an hour a day on food.

The Japanese spend close to two hours a day eating and drinking, placing them third behind New Zealanders. The Japanese like to spend their free time watching television or listening to the radio. This takes up 47 percent of free time in Japan.

Turks, on the other hand, spend more than a third of their free time staying with their friends.The survey showed that the difference between work and free time within certain countries is clear.

As for Italians, men have nearly 80 minutes a day of free time more than women. Much of the additional work time of Italian women is clearly cleaning the house.

小题1:Japanese and Korean people usually sleep about _______ a night.

A.six hours

B.eight hours

C.nine hours

D.ten hours小题2:The third paragraph mainly tells us _________.

A.French people are used to having fast food

B.French people are used to having sandwiches

C.French people spend much time eating

D.French people spend little time eating小题3:How long does a Mexican spend in eating?

A.One hour

B.Two hours

C.Three hours

D.Four hours小题4:It takes Japanese _______ of free time to watch TV or listen to the radio.

A.two thirds

B.about half

C.one third

D.all

单项选择题