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
2017-04-13
87
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/E1bZ777K
0
考研英语一
相关试题推荐
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Manyrunnersmaybewearingthewrongshoesfortheirparticularstride,accordingtoanewscientificresearchaboutrunningsh
随机试题
电子信息系统的主机房及其控制室、记录介质库,以及特殊贵重或火灾危险性大的机器、仪表、仪器设备室、贵重物品库房,应设置火灾自动报警系统。()
纤维素药皮类型焊条的特点是什么?
幻想是指与个人愿望相联系,并指向于未来的想象。
《国家中长期教育改革和发展规划纲要(2010—2020年)》中进一步明确了我国的教育方针,其中规定的教育目的是培养()。
高血压患者的体重不宜超过理想体重的
楼梯平台处的净空高度最低不应小于( )m。
甲公司2×17年发生的部分交易事项如下:(1)2×17年4月1日,甲公司对9名高管人员每人授予20万份甲公司股票认股权证,每份认股权证持有人有权在2×18年2月1日按每股10元的价格购买1股甲公司股票。该认股权证不附加其他行权条件,无论行权日相关人员是否
你所在辖区内的一家房地产开发商和业主因为交房时间和合同上不一致发生冲突,要你去处理,请问你会如何处理?
设随机变量X与Y相互独立,且服从同一分布N(μ,σ2/2),其中σ(a>0)是未知参数,记Z=X—Y.求Z的概率密度f(z);若Z1,Z2,…,Z2n(n≥2)为总体Z的简单随机样本,求σ2的最大似然估计量;记,利用的求相关系数ρUV.
CisoPIX525防火墙能够进行操作系统映像更新的访问模式是
最新回复
(
0
)