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
Dieting, according to an old joke, may not actually make you live longer, but it sure feels that way. Nevertheless, evidence has
Dieting, according to an old joke, may not actually make you live longer, but it sure feels that way. Nevertheless, evidence has
admin
2019-09-30
123
问题
Dieting, according to an old joke, may not actually make you live longer, but it sure feels that way. Nevertheless, evidence has been accumulating since the 1930s that calorie restriction—reducing an animal’s energy intake below its energy expenditure—extends lifespan and delays the onset of age-related diseases in rats, dogs, fish and monkeys. Such results have inspired thousands of people to put up with constant hunger in the hope of living longer, healthier lives. They have also led to a search for drugs that mimic the effects of calorie restriction without the pain of going on an actual diet.
Amid the hype(intensive publicity), it is easy to forget that no one has until now shown that calorie restriction works in humans. That omission, however, changed this month, with the publication of the initial results of the first systematic investigation into the matter. This study, known as CALERIE(Comprehensive Assessment of Long-term Effects of Reducing Intake of Energy), was sponsored by America’s National Institutes of Health. It took 48 men and women aged between 25 and 50 and assigned them randomly to either a control group or a calorie-restriction regime. Those in the second group were required to cut their calorie intake for six months to 75% of that needed to maintain their weight.
The CALERIE study is a landmark in the history of the field, because its subjects were either of normal weight or only slightly overweight Previous projects have used individuals who were clinically obese, thus confusing the unquestionable benefits to health of reducing obesity with the possible advantages of calorie restriction to the otherwise healthy.
At a molecular level, CALERIE suggests these advantages are real. For example, those on restricted diets had lower insulin resistance and lower levels of low-density lipoprotein cholesterol. They showed drops in body temperature and blood-insulin levels—both phenomena that have been seen in long-lived, calorie-restricted animals. They also suffered less oxidative damage to their DNA
Eric Ravussin, of Louisiana State University in Baton Rouge, who is one of the study’s authors, says that such results provide support for the theory that calorie restriction produces a metabolic adaptation over and above that which would be expected from weight loss alone. Nevertheless, such metabolic adaptation could be the reason why calorie restriction is associated with longer lifespans in other animals—and that is certainly the hope of those who, for the past 15 years, have been searching for ways of triggering that metabolic adaptation by means other than semi-starvation.
Which of the following is true about the CALERIE study?
选项
A、It proves that calorie restriction works in humans.
B、It has 24 male subjects and the same number of female ones.
C、It is the first investigation into the effects of calorie restriction.
D、It lasted for six months and had the final results published.
答案
A
解析
事实细节题,考查是非细节.文章第二段提到之前无人证明限制卡路里摄入量对人类同样有效,而CALERIE填补了之前的研究空白,意即此项研究证明了限制卡路里摄入量对人类有效,A项符合文意。
转载请注明原文地址:https://kaotiyun.com/show/nSe4777K
0
考研英语二
相关试题推荐
WhentheAmericaneconomywasrunningfulltilttwoyearsago,fewplaceswereasbreathlesslydelightedasSeattle.Itsportwa
Theword"this"(Paragraph1)probablyrefersto______.Accordingtothetext,geneticengineeringcanbeusedto______.
ThewriterwarnsAmericansthat______.Thewritergivestheexampleofbreadtoshowthat______.
ThemajordifferencebetweennarrativesalesandsuggestivesalesisthatMindycomparessalespeopletowinestewardsinthat_
Accordingtothepassage,thefactthatyoungpeopleseemtobelosinginterestinscience______.Thesecondparagraphismain
ManyAmericansregardthejurysystemasaconcreteexpressionofcrucialdemocraticvalues,includingtheprinciplesthatallc
ReadthefollowingChineseandwriteanabstractof80~100words.YoushouldwriteyouranswersonANSWERSHEET2.
Homeworkhasneverbeenterriblypopularwithstudentsandevenmanyparents,butinrecentyearsithasbeenparticularlyscorn
Writingforanhistoricalseriesistricky,andtheoutcomeisnotalwaysasuccess.ThebestoverallEuropeanhistoryinEnglis
随机试题
适用于对生产周期在半年以上或一年以上,仍需继续生产、销售并且有盈利的在制品评估的评估方法是()
A、背侧丘脑B、上丘脑C、下丘脑D、后丘脑E、底丘脑灰结节属于()
急性胰腺炎发病12小时以内,哪一项实验室检查诊断比较准确()(1995年)
A.加味保和丸B.曲麦枳术丸C.养胃增液丸D.参苓白术散E.补中益气丸
朱砂安神丸的组成药物中不含
阵发性室上性心动过速首选的药物是
A.药品评价中心B.国家中药品种保护审评委员会C.行政事项受理服务和投诉举报中心D.执业药师资格认证中心承担全国药品不良反应、医疗器械不良事件监测与评价的技术工作的是()。
外商投资企业和外国企业从事应纳资源税的资源的开采,也应缴纳资源税。()
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
DuringMcDonald’searlyyearsFrenchfriesweremadefromscratcheveryday.RussetBurbankpotatoeswere【1】,cutintoshoestrin
最新回复
(
0
)