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Parkinson’s is a disease of the central nervous system. It is a progressive disorder, meaning it gets worse over time. The disease affects a small area of cells in the middle of the brain. This area is called the substantial nigra(黑質). The cells slowly lose their ability to produce a chemical called dopamine(多巴胺). The decrease in the amonnt of dopamine can result in one or more general signs of Parkinson’s disease. These include shaking of the hands, arms and lege. They also include difficulty moving or keeping balanced while waslking or standing. Also, there may be emotional changes, like feeling depressed or worried. The symptoms(癥狀)of Parkinson’s differ from person to person. They also differ in their intensity(劇烈強度).

The disease is named after James Parkinson. He was a British doctor who first described this condition in 1817. During the 1960s, researchers discovered changes in the brains of people with the disease These discoveries led to mediums to treat the effects of the disease. There is no cure for Parkinson’s and no way to prevent it. And doctors still are not sure what causes Parkinson’s.

The United States National Institute of Health says at least 500,000 people in the country are believed to have Parkinson’s disease. About 50,000 new eases are reported each year. That number is expected to grow as the average age of the population increases.

Parkinson’s appears most often in people over the age of fifty. Some researchers believe that almost every one would develop Parkinson’s eventually if they lived long enough. Most patients have what is called idiopathic Parkinson’s disease. Idiopathic(先天)means the cause is unknown. People who develop the disease often want to link it to something they can identify. This might be a medieval operation or extreme emotional tension.

Yet many doctors reject this idea of a direct link to Parkinson’s. They point to people who have similar experiences and do not develop the disease.

47.If anyone has got the disease, he may have some trouble in      .

    A.common rolling                  B.physical actions

    C.formal communicating             D.daily eating

48.The disease, Parkinson usually takes place in     .

    A.nerve system                    B.the bone

    C.blood system                    D.the skin

49.From the passage, we could know that it is possible to develop Parkinson’s for .

    A.a teenager                      B.a young person

    C.an aged person                  D.a kid

50.The passage tells us that the disease      .

    A.usually has the similar symptom      B.was first discovered by an Asian

    C.is really easy to infect              D.is really hard to cure at present

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C.Why stem cells are needed in the transplant
D.How the windpipe is transplanted
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科目:高中英語 來源:廣東省桂洲中學2010屆高三上學期第三次月考 題型:閱讀理解


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閱讀下列短文,從每題所給A, B, C和 D項中,選出最佳選項。
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科目:高中英語 來源:2013-2014學年四川省高三第八次月考英語試卷(解析版) 題型:閱讀理解

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Pei Duanqing, a professor at Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, said his research team has combined an episomal system to deliver reprogramming factors with a chemically defined culture medium to reprogram kidney epithelial(腎表皮) cells in urine into NPCs.

These NPCs, normally only found in the human brain, were later proven to be transgene-free and self-renewing, he said.

"These nerve and brain cells can survive for up to one month when transplanted into the brain of a newborn rat," said Pei. "My team is working hard to understand why our experimental condition allowed the urine cells to become NPCs, because we want to improve the technique and make it more efficient".

Scientists have long searched to treat and study neural disorders by obtaining and transplanting neural stem cells. However, the previous method of getting and using cells from either fetal (胎兒)or adult human tissue remains challenging due to ethical concerns and immune system rejections, he said.

Pei hopes the discovery will be used to generate NPCs from patients with nerve disorders such as Parkinson's disease. "These NPCs from patients may help us discover new drugs for these diseases."

"It is a remarkable advance in the stem cell field. The results and methods obtained from this study will be of great value and significance to the field, " said Fred Gage,a professor with the Salk Institute for Biological Studies.

1.What is the passage mainly about?

A. NPCs are beneficial in treating human diseases.

B. Chinese scientists succeeded in making NPCs from human urine.

C. Chinese scientists have found cures for all diseases.

D. A new technique was used to study the use of human urine

2.Pei and his tean try their best to work hard in order to       .

A. make more contributions to medical study

B. discover another new technique

C. make the technique more perfect

D. treat more patients suffering from bad diseases

3.What is the challenge of making NPCs in the previous method?

A. The ethical comcerns and immune system refusal

B. The difificulties in getting cells from human.

C. The under-developed techniques in medical science.

D. The lack of financial support from the government.

4.From the last paragraph we can infer       .

A. the new technique will be developed in science

B. the results and methods will be applied to treating cancers

C. the study will give a major push to the stem cell field

D. the mew technique will bring great profis

 

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