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
71
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/vqr7FFFM
0
考研英语一
相关试题推荐
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
Olderpeoplemustbegivenmorechancestolearniftheyaretocontributetosocietyratherthanbeafinancialburden,accordi
High-qualitycustomerserviceispreachedbymany,butactuallykeepingcustomershappyiseasiersaidthandone.Shopperss
Manyrunnersmaybewearingthewrongshoesfortheirparticularstride,accordingtoanewscientificresearchaboutrunningsh
Moreevidenceisinthatso-callede-cigarettesdoletsmokersstopsmoking.Suchcigarettes【C1】______totheuseranoralnicoti
随机试题
在金融市场上,_______是商业银行的最后贷款者和金融市场的资金供给者。()
可以引起新生儿高胆红素血症的药物是
患儿4岁,因突起高热8小时,惊厥2小时就诊。体温40℃,呼吸32次/分,面色苍白,四肢发凉,皮肤有"花纹"。下列哪项检查最有助于迅速诊断( )
A.庆大霉素B.链霉素C.奈替米星D.妥布霉素E.小诺米星与其他抗结核病药联合应用的是
在设计某办公楼的空调系统时,对两种空调冷热源方案的能耗进行比较。方案1采用螺杆冷水机组加燃煤热水锅炉,螺杆冷水机组空调工况的综合能效比为3.5,燃煤热水锅炉的综合热效率为60%;方案2采用燃煤锅炉加蒸汽吸收式制冷机,燃煤蒸汽锅炉的综合热效率为55%,蒸汽吸
下列项目中,按照《招标投标法》,不属于必须招标的工程建设项目范围的是( )。
________是西方美术史上开拓浪漫主义艺术的先驱,其画风奇异多变,早期不加修饰地描绘人物内心活动的作品有________。
A、B、C、D、B
"BusinessClass"Whydoestheprofessormentionlaundrydetergent?
What’syourearliestchildhoodmemory?Canyourememberlearningtowalk?Ortalk?Thefirsttimeyou【C1】______thunderorwatche
最新回复
(
0
)