首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Athletes who cheat by injecting themselves with stored supplies of their own blood might soon be caught out. A revealing trail o
Athletes who cheat by injecting themselves with stored supplies of their own blood might soon be caught out. A revealing trail o
admin
2015-10-20
56
问题
Athletes who cheat by injecting themselves with stored supplies of their own blood might soon be caught out. A revealing trail of debris could give the game away.
Most "blood dopers" cheat by injecting themselves with the blood-boosting hormone erythropoietin(EPO), but there have been tests to detect EPO since 2000. Another way to dope blood is to periodically extract some of your own, store it and re-inject it before competitions. Some professional cyclists are alleged to have done this as part of a doping scandal that emerged in Spain in 2006, called Operacion Puerto. At least one cyclist is still fighting to clear his name.
Re-injecting stored blood boosts the oxygen supply to muscles. The practice has so far eluded detection but now there might be a way catch out the cheats.
During storage, red blood cells start to fall apart, generating debris such as the fragments of cell membranes(a cell membrane is the outside envelop of a living cell). Olaf Schumacher of the University of Freiburg in Germany and his colleagues have shown that when stored blood is re-injected, the recipient’s white blood cells prepare to get rid of this sudden tide of debris. They say that these changes on blood cell ’debris’ could betray sportsmen and make cheats detectable. "It’s like someone dumping rubbish in your blood," he says. "When all the rubbish comes at once, there’s lots of activity."
Schumacher’s team took blood from six non-athletes, stored it for 35 days then re-infused it, taking further blood samples three and four days afterwards. When they analyzed the white blood cells in these samples, genes needed for identifying and disposing of ailing and damaged cells were much more active than usual.
The gene changes led to the appearance of new proteins on the surface of the white blood cells which could potentially be picked up by antibodies, Schumacher says. He also suggests that antibodies could be created to detect the changes to the surface of red blood cells as well. Schumacher couldn’t say whether such tests would be ready in time for the 2012 Olympics in London. David Cowan, director of the UK Drug Control Centre at King’s College London, says: "The paper is promising, but more work is needed to establish a test that meets the rigorous standards required by sport so as not to falsely accuse an athlete." Schumacher says that one key goal is to make sure these changes only occur due to doping, rather than illness, for example.
What would be the best title for the text?
选项
A、Blood Cell "Debris" could Snare Sports Cheats
B、A New Type of Blood Doping
C、Several Measures Taken to Detect Blood Dopers
D、Antibodies are Created to Detect Blood Dopers
答案
A
解析
主旨大意题。全文主要讲的是利用血液“残骸”检测运动员的作弊行为。A项点明了主题,包含了关键词。
转载请注明原文地址:https://jikaoti.com/ti/VDe7FFFM
0
考研英语一
相关试题推荐
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
Conventionaldisplayadsaresimplywasteful,saysJakobNielsenofGroupM,alargemediabuyer.Sayacompanywantstoreachyo
Nearlyeverybodycheats,butusuallyonlyalittle.ThatisoneofthethemesinDanAriely’snewbook"The(Honest)TruthAboutD
Thesummer’smosttalkedaboutworkingpaperineconomicsisbyRobertGordon,anditissimplytitled"IsUSEconomicGrowthOv
Ifyouhaveeverboughtsomethingbecauseithadthemostpositivereviews,orjoinedinwithastandingovationsimplybecause
Butformany,thefactthatpoorpeopleareabletosupportthemselvesalmostaswellwithoutgovernmentaidastheydidwithit
【F1】Themajorityofsuccessfulseniormanagersdonotcloselyfollowtheclassicalrationalmodeloffirstclarifyinggoals,ass
Bankershavebeenblamingthemselvesfortheirtroublesinpublic.Behindthescenes,theyhavebeentakingaimatsomeoneelse;
Formuchofthisweek,NewYorkhasbeencaughtupinanunstoppableheatwave.Attimeslikethis,it’shardnottoimaginethe
Whenitcametomoral"reasoning,"weliketothinkourviewsonrightandwrongarerational,butultimatelytheyaregrounded
随机试题
Ifit______intheearlyApril,thecropswouldn’tbegrowingsowellnow.
A.寒B.暑C.湿D.燥E.火具有损伤阳气、凝滞、主痛特性的是()。
A.医患关系结构的“人机化”趋势B.医患交往的“经济化”趋势C.医患要求的“多元化”趋势D.医患关系调节方式的“法制化”趋势E.医患交往的“和谐化”趋势目前仍较普遍存在的看病责、药费高等问题,反映出
A.心悸气短,动则加剧,胸闷心痛,咳唾痰涎B.喘促气逆,不能平卧,痰稀量多,形寒肢冷C.下肢水肿,喘促气短,形寒肢冷,小便短少D.喘促日久,呼多吸少,面赤躁扰,汗出如珠E.咯痰黄稠,烦躁不安,心烦失眠,口干咽燥充血性心力衰竭心肾阳虚,水饮泛滥证
患者女,62岁,高血压1年。使用降压药时应注意
下列可不作为编制建设工程勘察、设计文件依据的是()。
路边停车带的停车布置方式为()。
人工地基处理的方法主要有()等。
琳琳在学习过程中,缺乏独立性,易受同学影响。当她发现自己的意见和同学们不一致时,往往不能坚持己见。这表明她的认知方式属于()
就要到了,阔别多年的家乡如今又会是一种什么样子?他不禁陷入了对家乡往日风貌的______。
最新回复
(
0
)