问题 实验题

结合下图,请用呼吸系统的相关知识回答问题:(11分)

(1)图A和图B中,气球代表人体的_____,瓶底的橡皮膜代表_____。

(2)图C和图D中,图­_____表示呼气状态,图­_____表示吸气气状态。

(3)呼吸系统由_______和肺组成,写出图E中各个数字代表的名称:

1        ;2        ;3        ;4        ;5        ;6        

答案

(1)肺 膈肌  (2)D.  C.(3)呼吸道  鼻腔 咽 喉 气管 支气管 肺

题目分析:胸廓有节律的扩大和缩小叫做呼吸运动,呼吸运动包括吸气和呼气两个过程,呼吸运动是肋间肌和膈肌收缩和舒张的结果,实现了肺的通气。图中A和B中所气球表示肺,瓶底的橡皮膜表示膈肌。图B表示吸气时肋间肌和膈肌收缩.胸廓的前后左右径和上下径都扩大,胸廓扩大,胸腔容积扩大,肺扩张,肺内气压低于大气压(外界气体压力),气体入肺,完成了图C所示吸气状态。图A表示呼气时肋间肌和膈肌舒张时,胸廓的前后左右径和上下径都减小,胸廓回缩,胸腔容积变小,肺回缩,肺内气压大于大气压(外界气体压力),气体出肺,完成了图D的呼气状态。人体的呼吸系统由呼吸道和肺两部分组成,呼吸道由图中的1鼻、2是咽、3是喉、4是气管、5是支气管,是气体进出的通道;6是肺,是完成气体交换的主要器官。

阅读理解

阅读理解。

     Prana was a beautiful dog, whose name means  "breath  of life". Although he died several years ago, I

can still remember the days we spent together and what he has taught me about love.

     I have two apple trees in the garden. Prana loved apples.  When he went outside, he'd catch an apple

and take it into the house to eat later.  The apples had been on the ground and were often dirty so I

wasn't always happy that Prana had brought them into the house.

     It was an autumn day in America, but it was very cold  A big snow fell and we had not done anything

for its coming.  On  that  special   day,   Prana  went  outside and I watched  him through the window.  I

noticed that he was madly digging (挖) holes and bringing the apples to the ground so they could be seen

above the snow. I did not know why he was doing this. He seemed to want to do something special.       .

     When I called him back, he had his usual  one  apple  in  his mouth. About five minutes later, I looked

outside.  The garden was completely covered with birds.  Prana  had  dug up all those apples for his bird

friends to eat. He knew that they wouldn't have stored enough food for the coming winter!

1. Prana was__________.                      

A. the writer                

B. a boy

C. a bird                    

D. a dog

2. I wasn't always happy because_________.

A. Prana loved apples

B. Prana caught an apple and ate it

C. `the apples fell on the ground and were dirty

D. Prana brought the dirty apples into the house            

3. On the snowy day, Prana ___________.

A. ate up all the apples

B. dug holes to put the apples in them

C. brought the apples under the snow to the ground

D. left the house and died

4. The birds flew to the garden to ____________.

A. look for Prana

B. eat the apples

C. make new homes

D. store food for the winter

5. The topic of the story is about ___________.        

A. apples              

B. animals

C. love                

D.life

选择题