问题 选择题

泌尿系统排出尿液的顺序是(  )

A.输尿管一肾脏一膀胱一 * *

B.肾脏一输尿管- * * 一膀胱

C.肾脏一输尿管一膀胱一 * *

D.膀胱一 * * 一输尿管一肾脏

答案

肾脏是形成尿的器官,其功能单位是肾单位,由肾小球、肾小囊、肾小管三部分组成;血液流经肾脏时,经过肾小球的滤过作用和肾小管的重吸收作用形成尿液,尿液经过肾盂流入输尿管,再由输尿管流入膀胱,膀胱有暂时储存尿液的作用,它有一个出口与 * * 相通,当尿液在膀胱内积存到一定数量时,刺激膀胱壁里感受器引起排尿反射, * * 括约肌舒张,尿从膀胱流出,经过 * * 排出体外,即尿液排出的顺序是肾脏→输尿管→膀胱→ * * .

故选:C

单项选择题

Many years ago, when I was fresh out of school and working in Denver, I was driving to my parents’ home in Missouri for Christmas. I stopped at a gas station(加油站) about 50 miles from Oklahoma City, where I was planning to stop and visit a friend. While I was standing inline at the cash register, I said hello to an older couple who were also paying for gas.

I took off, but had gone only a few miles when black smoke poured from the back of my car. I stopped and wondered what I should do. A car pulled up behind me. It was the couple I had spoken to at the gas station. They said they would take me to my friend’s home. We chatted on the way into the city, and when I got out of the car, the husband gave me his business card.

I wrote him and his wife a thank-you note for helping me. Soon afterward, I received a Christmas present from them. Their note that came with it said that helping me had made their holidays meaningful.

Years later, I drove to a meeting in a nearby town in the morning. In late afternoon I returned to my car and found that I’d left the lights on all day, and the battery was dead. Then I noticed that the Friendly Ford dealership—a shop selling cars was right next door. I walked over and found two salesmen in the showroom.

"Just how friendly is Friendly Ford" I asked and explained my trouble. They quickly drove a pickup truck to my car and started it. They would accept no payment, so when I got home, I wrote them a note to say thanks. I received a letter back from one of the salesmen. No one had ever taken the time to write him and say thank you, and it meant a lot, he said.

"Thank you" are two powerful words. They’re easy to say and mean so much.

The author planned to stop () at Oklahoma City.

A.to visit a friend

B.to see his parents

C.to pay at the cash register

D.to have more gas for his car

多项选择题