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
88
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.
The evidence since the 1930s has inspired people to
选项
A、live longer and healthier.
B、invent a calorie-restricting drug.
C、believe in calorie restriction.
D、get rid of constant hunger.
答案
C
解析
推理判断题。根据1930s定位文章第一段,其中提到人们忍受饥饿,以期换得长寿和健康。而挨饿的本质即是减少卡路里摄人量,因此选C项。
转载请注明原文地址:https://kaotiyun.com/show/9Se4777K
0
考研英语二
相关试题推荐
WhentheAmericaneconomywasrunningfulltilttwoyearsago,fewplaceswereasbreathlesslydelightedasSeattle.Itsportwa
ThewriterwarnsAmericansthat______.Thewritergivestheexampleofbreadtoshowthat______.
ThewriterwarnsAmericansthat______.Accordingtothepassage,ithaslongbeenbelievedthat______.
ReadthefollowingtextandanswerquestionsbymarkingTifthestateistrueorFifthestateisnottrue.Tippingisas
ReadthefollowingtextandanswerquestionsbymarkingTifthestateistrueorFifthestateisnottrue.Tippingisas
Workingatnonstandardtimes—evenings,nights,orweekends—istakingitstollonAmericanfamilies.One-fifthofallemployedAm
"Sustainability"hasbecomeapopularwordthesedays,buttoTedNing,theconceptwillalwayshavepersonalmeaning.Havingen
Beautyhasalwaysbeenregardedassomethingpraiseworthy.Almosteveryonethinksattractivepeoplearehappierandhealthier,h
Writingforanhistoricalseriesistricky,andtheoutcomeisnotalwaysasuccess.ThebestoverallEuropeanhistoryinEnglis
Notsolongago,itwasthestuffofnightmares:youpickupthelandlinetelephoneandthere’snodialingtone.Nothing.Theph
随机试题
在我国的教育法律体系中,()处于“母法”和“根本大法”的地位。
在相同条件下,钨极氩弧焊用的电极,以()电极放射剂量最低.,而且耐高温、寿命长。
大型药品零售企业的仓库的面积中型药品零售企业的仓库的面积
W公司如何才能合法占用该小区的土地?G购房户办理房屋产权登记时,除提交申请书、身份证外,还应提交哪些必备文件?
Windows7计算机操作系统32位版和64位版比较,最直观的区别是()。
摆架子
强迫行为不包括()
设有一个栈与一个队列的初始状态均为空。现有一个序列A,B,C,D,E,F,G,H。先分别将序列中的前4个元素依次入栈,后4个元素依次入队;然后分别将栈中的元素依次退栈,再将队列中的元素依次退队。最后得到的序列为
A、Itprovidesusfoodandplacetolive.B、Itcontactswithusfrombirthtodeath.C、Itworkswithgenestoshapewhoweare.D
A、Televisionshavegotwires.B、Broadcasttelevisionusespublicairwaves.C、Cabletelevisionhasgainedpopularity.D、Televisio
最新回复
(
0
)