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
83
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 do we learn about this test from David Cowan’s comment?
选项
A、The test is promising and could be adopted right away.
B、The test is far from meeting the rigorous standards required by sport.
C、The test needs to be improved in the hope of not wronging an athlete.
D、The 2012 Olympics in London will adopt such anti-doping test.
答案
C
解析
判断推理题。根据题干中人名定位到第六段第四句。此句提到大卫·考恩认为要进一步加强研究,以保证不冤枉运动员。C项符合文意。
转载请注明原文地址:https://kaotiyun.com/show/g3zZ777K
0
考研英语一
相关试题推荐
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworryaboutthesupposedilleffectscausedbyradiation
Researchersinvestigatingbrainsizeandmentalabilitysaytheirworkoffersevidencethateducationprotectsthemindfromthe
YouandsomeofyourclassmatesdecidetogoforanoutingtotheSummerPalaceduringtheNationalDayholidays.Astheorganiz
Weassumedethicsneededthesealofcertainty,elseitwasnon-rational.Andcertaintywastobeproducedbyadeductivemodel:
Ifyouhaveeverboughtsomethingbecauseithadthemostpositivereviews,orjoinedinwithastandingovationsimplybecause
Americanstodaydon’tplaceaveryhighvalueonintellect.Ourheroesareathletes,entertainers,andentrepreneurs,notschola
【F1】Themajorityofsuccessfulseniormanagersdonotcloselyfollowtheclassicalrationalmodeloffirstclarifyinggoals,ass
Bankershavebeenblamingthemselvesfortheirtroublesinpublic.Behindthescenes,theyhavebeentakingaimatsomeoneelse;
Formuchofthisweek,NewYorkhasbeencaughtupinanunstoppableheatwave.Attimeslikethis,it’shardnottoimaginethe
随机试题
Notuntilamonkeyisseveralyearsold______toexhibitsignsofindependencefromitsmother.
化学除锈液中常加的助剂有哪些?
A.肾上腺囊肿B.卵巢囊肿C.肾单纯性囊肿D.前列腺囊肿E.输尿管囊肿CT片示:CT提示附件区或子宫直肠陷窝处的均一水样密度肿块,呈圆形或椭圆形,边缘光滑,壁薄,无内隔,增强扫描无强化
下列不属于安全玻璃的是()。
消费者对商品进行比较、鉴别和挑选的权利属于()。
20×2年1月1日,甲公司以银行存款5000万元为对价取得乙公司30%的股权,能够对乙公司施加重大影响。投资当日,乙公司可辨认净资产账面价值为19900万元,公允价值为20000万元,差额为一批存货的公允价值大于账面价值产生。当年6月20日,甲公司将成本为
在微机中,存储容量为5MB,指的是()。
根据《刑法》第72条的规定,对于被判处()的犯罪分子,根据犯罪分子的犯罪情节和悔罪表现,适用缓刑确实不致再危害社会的,可以宣告缓刑。
风险调整系数=净收益/经济成本。银行的贷款违约率为30个BP,违约损失为50%,违约风险暴露为150万元,已知贷款收益为1万元,经济成本为违约风险暴露的5%,求风险调整系数。
In1957adoctorinSingaporenoticedthathospitalsweretreatinganunusualnumberofinfluenza-likecases.Influenzaissomet
最新回复
(
0
)