问题 读图填空题

下图表示某淋巴细胞,膜外颗粒为抗体,请回答:

(1)该细胞为__________,它是由_____________分化而来的,能够分化为这种细胞的原因有:__________;__________;_____________。

(2)抗体的化学本质是_______________,它能消灭_____________,抗体从合成到分泌出细胞,经过的细胞结构依次是(用标号)__________。抗体的分泌过程说明细胞的各种生物膜在结构上具有___________。并以[ ]______________的形式转变的。

(3)在抗体分泌的过程中要消耗由[ ]______________提供的能量。

(4)如果侵入人体的抗原是病菌,那么抗体与病菌结合,可以抑制病菌的___________或是对宿主细胞的___________,从而防止感染和疾病的发生;如果侵入人体的抗原是病毒,那么抗体就会与病毒结合,可以使病毒失去____________宿主细胞的能力。在多数情况下,抗原与抗体结合后会发生进一步的变化,如形成沉淀或细胞集团,进而被____________消化。

答案

(1)效应B细胞       B细胞或记忆细胞        抗原直接刺激B细胞        抗原由T细胞呈递而刺激B细胞        抗原刺激记忆细胞

(2)蛋白质       抗原      ③→④→②→⑦→①      一定的连续性       [⑦] 分泌小泡 

(3)[⑥]线粒体

(4)繁殖      黏附      侵染和破坏       吞噬细胞

阅读理解

Close your eyes for a minute and imagine what life would be like if you had a hundred dollars less. Also imagine what it would be like spending the rest of your life with you eyes closed. Imagine having to read this page, not with your eyes but with your finger-tips.

With existing medical knowledge and skills, two-thirds of the world’s 42 million blind should not have to suffer. Unfortunately, rich countries posses most of this knowledge, while developing countries do not.

ORBIS is an international non-profit organization which operates the world’s only flying teaching eye hospital. ORBIS intends to help fight blindness worldwide. Inside a DC-8 aircraft, there is a fully-equipped teaching hospital with television studio and classroom. Doctors are taught the latest techniques of bringing sight back to people there. Project ORBIS also aims at promoting peaceful cooperation(合作) among countries.

ORBIS tries to help developing countries by providing training during three-week medical programs. ORBIS has taught sight-saving techniques to over 35,000 doctors and nurses, who continue to cure tens of thousands of blind people every year. ORBIS has conducted 17 plane programs is China so far. For the seven to ten million blind in China ORBIS is planning to do more for them. At the moment an ORBIS is working on a long-term plan to develop a training center and to provide eye care service to Shanxi Province. ORBIS needs your help to continue their work and free people from blindness.

For just US$38,you can help one person see; for $380 you can bring sight to 10 people; $1,300 helps teach a doctor new skills; and for $13,000 you can provide a training programme for a group of doctors who can make thousands of blind people see again. Your money can open their eyes to the world. Please help ORBIS improve the quality of life for so many people less fortunate than ourselves.

小题1:The first paragraph is intended to ______.

A.introduce a new way of reading

B.advise the public to lead a simple life

C.direct the public’s attention to the blind

D.Encourage the public to use imagination小题2:What do we learn about existing medical knowledge and skills in the world?

A.They are adequate

B.They have not been updated.

C.They are not equally distributed

D.They have benefited most of the blind小题3:ORRIS aims to help the blind by ______.

A.teaching medical students

B.training doctors and nurses

C.running flying hospitals globally

D.setting up non-profit organization小题4:What does the author try to do in the last paragraph?

A.Appeal for donations

B.Make an advertisement

C.Promote training programs

D.Show sympathy for the blind小题5:What can be the best title for the passage?

A.ORRIS in China

B.Fighting Blindness

C.ORRIS Flying Hospital

D.Sight-seeing Techniques

多项选择题