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
61
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.
What makes the CALERIE study a significant one in the field?
选项
A、It used the subjects of both genders and different ages.
B、It selected people of normal weight as the subjects.
C、It rectified the misconception of dieting.
D、It was systematic in research method and based on evidence.
答案
B
解析
事实细节题,考查例证细节。第三段首句指出,CALERIE研究之所以是一座里程碑是因为选取的研究个体为体重正常或轻微偏重的个体,B项符合。
转载请注明原文地址:https://kaotiyun.com/show/QNzZ777K
0
考研英语一
相关试题推荐
StrangethingshavebeenhappeningtoEngland.Still【1】fromthedissolutionoftheempireintheyears【2】WorldWarⅡ,nowtheEn
Doanimalshaverights?Thisishowthequestionisusuallyput.Itsoundslikeauseful,groundclearingwaytostart.(46)Actu
Wemaydosomethingwiththebestofintentions,andsometimesevenaccomplishthegoodtowardwhichweaim.Yet,atthesameti
Nowthat2012isover,theWallStreetJournalisponderingwhetherthee-readereraiscomingtoanend.Althoughthestorysto
Nowthat2012isover,theWallStreetJournalisponderingwhetherthee-readereraiscomingtoanend.Althoughthestorysto
It’sGroundhogDayattheUSPostalService:timeonceagainforthefamiliarlamentsabouthowtheagency’sfinanciallossesar
It’sGroundhogDayattheUSPostalService:timeonceagainforthefamiliarlamentsabouthowtheagency’sfinanciallossesar
[A]Notgivingbonustoemployeeswhodeserveit[B]Notgivingpositiveinformation[C]Notlinkingindividualjobstothebigpic
Theauthorofsomefortynovels,anumberofplays,volumesofverse,historical,criticalandautobiographicalworks,aneditor
Everyday,employeesmakedecisionsaboutwhethertoactlikegiversorliketakers.Whentheyactlikegivers,theycontribute
随机试题
膻中穴在前正中线上,两乳头之间,平()处
在大型的高层建筑中,常将球墨铸铁管设计为总立管,其接口连接方式有()。
下列属于招标阶段的主要工作是()。
同一财产向两个以上债权人抵押的,拍卖、变卖抵押财产所得价款应当依照有关法律制度的规定清偿。下列各项中,符合规定的有()。
在我国与世界各国和地区在发展对外经济关系、扩大对外贸易、吸收和利用外资、发展对外技术交流时,都必须坚持的一个共同原则是()。
在美术课堂作业辅导中,不适合的做法是()。
下面是一位实习教师的教学日志,请根据材料回答问题。小黎是初中二年级的一位女生,父母双双外出打工。她个性很特别,在班上,她与同学的关系不太融洽,甚至有点紧张。开学初曾与一名男同学打架,对班主任的批评教育反应强烈,存在明显的抵触情绪。有一次晚自修课上,她戴耳
一种非侵犯性诊断程序——磁共振造影M,能被用来确认冠状动脉堵塞。与一种经常使用的侵犯性诊断程序A相比,磁共振造影M不会对病人产生危害。因此,为了在探测动脉是否堵塞时确保病人的安全,M应在所有此类诊断冠状动脉堵塞时取代A。以下哪项如果为真,最能支持上述论证?
数字音频的比特率(码率)指的是每秒钟的数据量,它与取样频率、量化位数、声道数目、使用的压缩编码方法等密切相关。假设数字音频的比特率为32kb/s,其量化位数为8位,单声道,采用压缩编码,压缩比为2,那么取样频率是()。
考生文件夹下存在一个数据库文件“samp3.accdb”,里面已经设计了表对象“tEmp”、查询对象“qEmp”和窗体对象“fEmp"。同时,给出窗体对象“fEmp”上“退出”按钮的单击事件代码,试按以下功能要求补充设计。单击“退出”按钮(名为“bt2
最新回复
(
0
)