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
25
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://jikaoti.com/ti/6Ee7FFFM
0
考研英语一
相关试题推荐
InPlato’sUtopia,herearethreeclasses:thecommonpeople,thesoldiers,andtheguardianschosenbythelegislator.Themain
Thequestionofwhereinsightscomefromhasbecomeahottopicinneuroscience,despitethefactthattheyarenoteasytoindu
Somepeopleviewedthefindingswithcaution,notingthatacause-and-effectrelationshipbetweenpassivesmokingandcancerrem
Youwillgraduatefromuniversityandintendtocontinueyourfurtherstudyoverseas.Writealettertoagraduateschoolto1)
Accordingtothepassage,whichorganizationsraisedtheproposaltostopthepracticeofliedetectionevidenceinmilitarycou
In1939twobrothers,MacandDickMcDonald,startedadrive-inrestaurantinSanBernadino,California.Theycarefullychosea
Theauthorofsomefortynovels,anumberofplays,volumesofverse,historical,criticalandautobiographicalworks,aneditor
AsGilbertWhite,Darwin,andothersobservedlongago,allspeciesappeartohavetheinnatecapacitytoincreasetheirnumbers
Anumberofethicalquestionsclusteraroundbothendsofthehumanlifespan.Whetherabortionismorallyjustifiablehaspopul
"AtBoozAllen,we’reshapingthefutureofcyber-security,"trumpetsarecruitingmessageonthewebsiteofBoozAllenHamilton
随机试题
患者,男性,68岁,有慢性阻塞性肺气肿病史。咳嗽、脓痰伴气急加重2周,今晨神志恍惚,体检:嗜睡,口唇发绀,两肺湿哕音,心率116次/分,血压185/105mmHg。此时最主要的治疗在于
某测绘单位受房管局委托,承担了花园小区B区的房地产测绘任务,该区共有建筑10栋,房屋建筑形式为住宅形式。本房产测绘工程的主要目的是进行产权登记测绘。任务包括房产平面控制测量、房产调查、房产要素测量、房产图绘制、房产面积测算、房产分户以及成果资料的检查与验收
新产品开发战略的核心内容包括()。
某大型油田2014年10月份生产原油20万吨,其中出售15万吨,取得不含税销售额30000万元;用于修井耗用原油5万吨。当月在采油过程中回收并销售伴生天然气500万立方米,取得不含税销售额300万元。已知原油适用的税率为8%。天然气适用税率6%。则该油田1
从业人员在职业技能上“勇于进取”的品质要求包括()。
设三阶实对称矩阵A的特征值为λ1=一1,λ2=λ3=1,对应于λ1的特征向量为ξ1=(0,1,1)T,求A。
(2005上项管)某项目经理所在的单位正在启动一个新的项目,配备了虚拟项目小组。根据过去的经验,该项目经理认识到矩阵环境下的小组成员有时对职能经理的配合超过对项目经理的配合。因此,该项目经理决定请求单位制定_____(1)。在项目执行过程中,有时需要对项目
标准化的工作是实现EDI互通、互联的前提和基础,其中______解决各种报文类型格式、数据元编码、字符集和语法规则。
下列关于接入技术特征的描述中,正确的是()。
Wearecertainthathewillgetoverhisillness.
最新回复
(
0
)