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
2015-06-24
63
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 todetect EPOsince 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.
Which kind of "blood dopers" is least likely to be detected in the past?
选项
A、People who inject themselves with EPO.
B、People who extract and re-inject some of their own blood.
C、People who took part in cycling competition in Spain in 2006.
D、People who are careful enough to avoid detection.
答案
B
解析
事实细节题,考查是非细节。第三段第二句讲到,长久以来,这种做法(re-injecting stored blood)一直无法被检查出来,B项符合文意。A项为两种作假方法中容易被检测出的一种;C、D两项在文中并未提及。
转载请注明原文地址:https://kaotiyun.com/show/Q574777K
0
考研英语一
相关试题推荐
TheBicycleSharingPlansofEuropeWhileonvacationinBarcelonalastmonth,LauraCaddicksawalotofpeopletoolingaro
Despitetheeverydayuseofelectricalappliancesandtechnicaldevices,onlyaminorityofpeoplelivingtodayhasdeeperinsig
Somegreatmeninsistthateducationshouldheconfinedtosomeparticularandnarrowend,andshouldissueinsomedefinitewor
Pictureyourselfasahistorianin2035,tryingtomakesenseofthisyear’sAmericanelectioncampaign.Manyofthewebsitesan
Helpingterminallyillpeopletocommitsuicideshouldbemadelegalunderstrictnewsafeguards,amajorindependentreportis
Helpingterminallyillpeopletocommitsuicideshouldbemadelegalunderstrictnewsafeguards,amajorindependentreportis
Intalksaboutreducingthenation’sexplodinghealthcarecosts,theword"rationing"strikesfearintotheheartsofbothpati
Thedifferencesinlivingstandardsaroundtheworldarevast.In1993,theaverageAmericanhadanincomeofabout$25,000.In
Theworldisundergoingtremendouschanges.Theriseofglobalization,bothaneconomicandculturaltrendthathassweptthroug
ManyforeignerswhohavenotvisitedBritaincallalltheinhabitantsEnglish,fortheyareusedtothinkingoftheBritishIsle
随机试题
海岸工程建设项目主要包括()以及其他一切改变海岸、海涂自然性状的开发工程建设项目。
建设永久性测量标志需要占用土地的,地下标志占用土地范围为()。
《中华人民共和国环境影保护法》规定,开发利用自然资源,应当(),依法制定有关生态保护和恢复治理方案并予以实施。
工程咨询单位在业务开发时,通过()体现和贯彻公司的经营战略。
水泵安装得好坏,对水泵的运行和寿命有重要影响。水泵安装有整体安装和分体安装两种方式。下列关于水泵安装操作中不正确的是()。
“备案号”栏应填()。“征免”栏应填()。
某企业2014年1月1日开始建造一项固定资产,未取得专门借款而占用两笔一般借款。一般借款包括:2014年1月1日借入三年期借款3000万元,年利率6%;20149月1日发行五年期债券2000万元,票面利率5%,到期一次还本付息,发行价2000万元。如果按照
非境内注册居民企业应当自收到居民身份认定书之日起30日内向主管税务机关申报办理税务登记,需要提供的资料有()。
存疑时有利于被告原则是指在刑事诉讼中遇到事实无法查清或查清事实所需成本过高的情况,依照有利于被告的原则判决。根据上述定义,下列表现符合该原则的是:
我国《刑法》明确规定:“国家工作人员滥用职权,假公济私,对控告人、申诉人、批评人实行报复陷害的,要判有期徒刑或拘役。”这表明:
最新回复
(
0
)