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
2015-10-20
48
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://www.kaotiyun.com/show/LNzZ777K
0
考研英语一
相关试题推荐
TheElectromagneticRadiationAffectsOurLifeWhethermobilephonescancausecancerremainsanopenquestion.Buttheyare
StrangethingshavebeenhappeningtoEngland.Still【1】fromthedissolutionoftheempireintheyears【2】WorldWarⅡ,nowtheEn
Accordingtothetext,abadfalloftheauthorresultedin______.Whentheauthorsmelledcutgrassagainforthefirsttime,
Thoughusuallyunintendedandoftenunrecognized,muchofbehavioralscienceisavalue-ladenenterprise.【F1】Researchquestions
Youwillgraduatefromuniversityandintendtocontinueyourfurtherstudyoverseas.Writealettertoagraduateschoolto1)
Researchersinvestigatingbrainsizeandmentalabilitysaytheirworkoffersevidencethateducationprotectsthemindfromthe
Inrecentyears,Microsofthasfocusedonthreebigtasks,buildingrobustsecurityintoitssoftware,resolvingnumerousantitr
Theroleofgovernmentsinenvironmentalmanagementisdifficultbutinescapable.Sometimes,thestatetriestomanagetheresou
Theroleofgovernmentsinenvironmentalmanagementisdifficultbutinescapable.Sometimes,thestatetriestomanagetheresou
AsGilbertWhite,Darwin,andothersobservedlongago,allspeciesappeartohavetheinnatecapacitytoincreasetheirnumbers
随机试题
简述收集次级资料过程中存在的问题。
对冠心病患者进行饮食指导,正确的是()
沈某,男,28岁。外生殖器及肛门出现单个质坚韧丘疹,四周掀肿,腹股沟部有杏核样大、色白坚硬之肿块,伴口苦纳呆,尿短赤,大便秘结,舌苔黄腻,脉弦数。西医诊断为梅毒。其证候是
开窍醒神兼化湿和胃开窍醒神兼清热止痛
在金属油罐质量的检验及验收中,常用的无损探伤方法有( )。
借款人因学习成绩不好,未能拿到毕业证书或学位证书,毕业后找不到工作,将会形成个人教育贷款中信用风险内容之一的是()
集中注意倾听的能力属于()
教育目的在各级各类教育机构的具体化是()
政府职能转变的关键是政企分开。
某年级有学生若干人,列成三层中空方阵,多出9人,如在中空部分增列两层,则少15人,问该年级有学生多少人?
最新回复
(
0
)