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
30
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://kaotiyun.com/show/r3zZ777K
0
考研英语一
相关试题推荐
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworryaboutthesupposedilleffectscausedbyradiation
Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworryaboutthesupposedilleffectscausedbyradiation
Assummerrollsaround,lawmakersinWashingtonarepreparingtovoteonajobsbillthatwouldinclude$1billionforsummerjo
StephenM.Saland,chairmanoftheStateSenateEducationCommittee,isaconservativeupstateRepublican,andStevenSanders,c
Accordingtotheauthor,______isthemostimportantfunctionofinstitutionsofhighereducation.Aseriousoutcomebroughto
Californiaishavingproblemswithitsdeathpenalty.Ithasn’texecutedanyonesince2006,whenafederalcourtruledthatits
Bankershavebeenblamingthemselvesfortheirtroublesinpublic.Behindthescenes,theyhavebeentakingaimatsomeoneelse;
"Itkeepsyougrounded,putsyouinasituationthatkeepsyououtoftrouble,andputsyouwithagroupthathasthesamemind-
Whenitcametomoral"reasoning,"weliketothinkourviewsonrightandwrongarerational,butultimatelytheyaregrounded
Whenitcametomoral"reasoning,"weliketothinkourviewsonrightandwrongarerational,butultimatelytheyaregrounded
随机试题
女,42岁,多饮、多食10年,空腹血糖经常大于10.8mmol/L。近2个月来眼睑及下肢轻度水肿,血压160/100minHg,尿蛋白(++)。最可能的诊断为
不符合张力性气胸的病理生理改变是
按课税对象的性质可将税收分为()三大类。
下列不属于建筑工程一切险的保险责任范围的是()。
()主要指运用金融工具和其他手段实现既定目标的程序和策略,不仅包括金融工具的创新,而且还包括金融工具运用的创新。
银行工作人员以下行为没有违反内幕交易的是()。
某股份有限公司2007年3月发行3年期公司债券1000万元,1年期公司债券500万元。2009年1月,该公司鉴于到期债券已偿还且具备再次发行公司债券的其他条件,计划再次申请发行公司债券。经审计确认该公司当期净资产额为6000万元。该公司此次发行公司债券额最
质量()是质量检验最重要、最基本的功能。
神经化学物质的失衡可以引起人的行为失常,大到严重的精神疾病,小到常见的孤僻、抑郁甚至暴躁、嫉妒。神经化学的这些发现,使我们不但对精神疾病患者,而且对身边原本生厌的怪癖行为者,怀有同情和容忍,因为精神健康无非是具有平衡的神经化学物质。以下哪项最为准确地表达了
用IPSec机制实现VPN时,如果企业内部网使用了私用IP地址,应该采用(49)技术,IPSec该采用(50)模式。50.
最新回复
(
0
)