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
Calories and Human Health Dieting, according to an old joke, may not actually make you live longer, but it sure feels that w
Calories and Human Health Dieting, according to an old joke, may not actually make you live longer, but it sure feels that w
admin
2013-07-08
88
问题
Calories and Human Health
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 clarified the advantages of calorie restriction to normal people.
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研究的优势在于选取的研究个体为体重正常或轻微偏重的个体,[B]项符合。[A]项错误,CALERIE的突破在于选取对象的体重,而非性别和年龄;[C]项“它纠正了节食这种错误观念”在文中并没有提及;[D]项中的evidence在文中也没有提及。
转载请注明原文地址:https://kaotiyun.com/show/jsO4777K
0
考研英语一
相关试题推荐
TheoldsoftwareindustryjokeisusedinthetexttoAccordingtotheresearchers,comparedwithhumblermanagers,narcissisti
LastNovember,engineersinthehealthcaredivisionofGEunveiledsomethingcalledthe"Light-SpeedVCT",ascannerthatcancr
TryingtogetAmericanstoeatahealthydietisafrustratingbusinesscanbeeasilyprovedbythefactthatThebiggestprobl
Fiercelyindependent,90year-oldVincenziaRinaldiwouldn’tconsiderahomehealthaideornursinghome.SoLouisCritelli,her
TheauthorwoulddescribetheReisses’lifeasAsfortheirchildren,parentsaresupposedbyDarrahto
Theyclaimthat______1,000factoriescloseddownduringtheeconomiccrisis.
ItisincongruousthatthenumberofBritishinstitutionsofferingMBAcoursesshouldhavegrownby254percentduringaperiod
ItisincongruousthatthenumberofBritishinstitutionsofferingMBAcoursesshouldhavegrownby254percentduringaperiod
ItisincongruousthatthenumberofBritishinstitutionsofferingMBAcoursesshouldhavegrownby254percentduringaperiod
随机试题
KPX-121配产器的偏孔直径为()。
引进500#乙二醇脱水装置中D—504保持适当的操作压力是必要的,其设计值为()MPa。
在已经有的报表中创建子报表,需要确保主报表和子报表所依赖的()已经正确地确立了关系。
下列关于温抗体型自身免疫性溶血性贫血的叙述不正确的是
基站机房共享时,必须根据所有设备的()及楼面结构布置等对机房楼面结构进行安全评估。
某资产评估事务所承包了W企业的一个评估业务,评估对象为W企业2014年购进的一条生产线M,账面原值为300万元,2017年进行评估。在评估过程中评估专业人员收集、整理、分析评估资料,经测算,从2012年到2017年M生产线的价格每年比上一年上长了10%。专
余涌:素食不会导致营养不良。研究表明,人体所需要的各种营养素,从蛋白质到各种微量元素,素食都可以足量含有。方宁:你说素食不会导致营养不良,我不同意。如果所有的人都素食,则目前所有与肉食有关的产业将全部倒闭,由此产生的失业大军将使难以计数的人陷入贫困而
线程在生命周期中要经历5种状态。如果线程当前是新建状态,则它可到达的下一个状态是()。
Ifyouareafanofsciencefiction,you’venodoubtencounteredthetermnanotechnol-ogy.Yetoverthepastyearalso,aseries
Theangryoldladydidn’tknowwho______forthebrokenglass.
最新回复
(
0
)