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
105
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
Theword"this"(Paragraph1)probablyrefersto______.Itisimpliedthatthemainimpactthatgenetransferbetweencropsan
ThewriterwarnsAmericansthat______.Whatistheconclusionofthispassage?
ThemajordifferencebetweennarrativesalesandsuggestivesalesisthatAccordingtoAlan,creativityinsalespeople______.
Excitement,fatigue,andanxietycanallbedetectedfromsomeone’sblinks,accordingtopsychologistJohnStern(21)Washington
YouhavejustcomebackfromtheU.S.asamemberofaSino-Americanculturalexchangeprogram.WritealettertoyourAmerican
Pricesarcsky-high,withprofitstomatch.Butlookingfurtherahead,theindustryfaceswrenchingchange,saysanexpertofen
ReadthefollowingChineseandwriteanabstractof80~100words.YouwriteyourabstractonANSWERSHEET2.
ReadthefollowingtextandanswerquestionsbymarkingTifthestateistrueorFifthestateisnottrue.Tippingisas
Iamaddictedtoelectricity.Soareyou.Andsoisyourbusiness.Weliveinan"alwayson"world—airconditioners,streetlight
随机试题
法律的本质是()
现金出纳每天工作结束前都要将库存现金日记账结清并与库存现金实存数核对,这属于()。
公路货物运输途中作业包括()。
皮亚杰所提出的儿童认知发展阶段包括()。
发表于1806年的《普通教育学》的作者是()
2017年3月12日,国家主席习近平在出席十二届全国人大五次会议解放军代表团全体会议时指出,()是军民融合发展的重点,也是衡量军民融合发展水平的重要标志。
Thegovernessagreedtoteachthetemperamentalchild________shewasgivencompleteauthority.
チケット
李:もしもし、△△歯科医院でしょうか。受付:はい、そうです。どうしましたか。李:昨夜から歯が【R1】________、がまんできないんです。受付:それじゃ、早いほうがいいでしょうね。李:ええ、早ければ早いほどいいです。受付:ちょっと予約をみ
SigmundFreudwasaworld-famousdoctorofVienna(维也纳).Hewasalsoamanfullofhumour(幽默).Once,athis70thbirthdayparty,
最新回复
(
0
)