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
47
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.
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。
转载请注明原文地址:https://kaotiyun.com/show/03zZ777K
0
考研英语一
相关试题推荐
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworryaboutthesupposedilleffectscausedbyradiation
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworryaboutthesupposedilleffectscausedbyradiation
Fromthefirstsentenceofthepassage,welearnthat______Whyisacidrainlittleunderstood?______
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
Conventionaldisplayadsaresimplywasteful,saysJakobNielsenofGroupM,alargemediabuyer.Sayacompanywantstoreachyo
Thesummer’smosttalkedaboutworkingpaperineconomicsisbyRobertGordon,anditissimplytitled"IsUSEconomicGrowthOv
Lookaroundtheworldandtheforcesaremassing.OnonesideareCalifornianprisonguards,Britishpolicemen,Frenchrailworke
Lookaroundtheworldandtheforcesaremassing.OnonesideareCalifornianprisonguards,Britishpolicemen,Frenchrailworke
Bankershavebeenblamingthemselvesfortheirtroublesinpublic.Behindthescenes,theyhavebeentakingaimatsomeoneelse;
Bankershavebeenblamingthemselvesfortheirtroublesinpublic.Behindthescenes,theyhavebeentakingaimatsomeoneelse;
随机试题
全口义齿的固位主要靠吸附力,与吸附力大小关系最密切的是A.基托的外形B.基托的厚度C.基托与黏膜的密合度D.人工牙的排列情况E.咬合力的大小
W研究所设计了一种高性能发动机,在我国和《巴黎公约》成员国L国均获得了发明专利权,并分别给予甲公司在我国、乙公司在L国的独占实施许可。下列哪一行为在我国构成对该专利的侵权?
传热的基本方式有()。
对于施工方案主要内容,以下表述正确的有()。
不符合固定总价合同适用情况的是()。
住所位于甲市A区的甲房地产开发公司在甲市B区开发一片住宅小区,经过招标投标,住所地在甲市C区的乙建筑工程公司中标,双方签订承包合同并在合同中约定:若就本合同发生争议由甲市A区基层人发法院管辖。后因为工程质量不合格双方发生争议。对此案第一审有管辖权的法院是(
若企业资产总额为1000万元,所有者权益总额为800万元,则负债总额为( )。
8,一4,2,-1,()
"TheHeartoftheMatter,"thejust-releasedreportbytheAmericanAcademyofArtsandSciences(AAAS),deservespraiseforaffi
PASSAGEONEWhydidthegirlplaybasketballoverandoveragain?WherewouldIreneprobablyputtheuglynewradio?
最新回复
(
0
)