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
外语
A meager diet may give you health and long life, but it’s not much fun—and it might not even be necessary. We may be able to han
A meager diet may give you health and long life, but it’s not much fun—and it might not even be necessary. We may be able to han
admin
2011-01-10
27
问题
A meager diet may give you health and long life, but it’s not much fun—and it might not even be necessary. We may be able to hang on to most of that youthful vigor even if we don’t start to diet until old age.
Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse’s liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation won’t reverse other damage caused by time for the mouse, but could help its liver metabolize drugs or get rid of toxins.
Spindler’s team fed three mice a normal diet for their whole lives, and fed another three on half-rations. Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old—equivalent to about 70 human years.
The researchers checked the activity of 11,000 genes from the mouse livers, and found that 46 changed with age in the normally fed mice. The changes were associated with things like inflammation and free radical production—probably bad news for mouse health. In the mice that had dieted all their lives, 27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes.
"This is the first indication that these effects kick in pretty quickly," says Huber Warner from the National Institute on Aging near Washington, D.C..
No one yet knows if calorie restriction works in people as it does in mice, but Spindler is hopeful. "There’s attracting and tempting evidence out there that it will work," he says.
If it does work in people, there might be good reasons for rejuvenating the liver. As we get older, our bodies are less efficient at metabolizing drugs, for example. A brief period of time of dieting, says Spindler, could be enough to make sure a drug is effective.
But Spindler isn’t sure the trade-off is worth it. "The mice get less disease, they live longer, but they’re hungry," he says. "Even seeing what a diet does, it’s still hard to go to a restaurant and say: ’I can only eat half of that’."
Spindler hopes we soon won’t need to diet at all. His company, Life Span Genetics in California, is looking for drugs that have the effects of calorie restriction.
According to the last two paragraphs, Spindler believes that ______.
选项
A、calorie restriction is very important to people
B、seeing the effect of a diet, people will eat less than normal
C、dieting might not be the best method to give us health and a long life
D、drugs do not have the effects of calorie restriction
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/kUcO777K
本试题收录于:
NAETI中级口译笔试题库外语翻译证书(NAETI)分类
0
NAETI中级口译笔试
外语翻译证书(NAETI)
相关试题推荐
Inspiteofillhealthandaphysicaldisabilitythatthreatenedhercareer.CarsonMcCullerscompletedanovelinthesummerof
Itisacontradictionthatinsucharichcountrythereshouldbesomanypoorpeople.
IntheUnitedStatesandinmanyothercountriesaroundtheworld,therearefourmainwaysforpeopletobe【C1】______aboutdeve
Justlastweek,forexample,theWorldHealthOrganization(WHO)announcedthedisturbingdisclosurethatchickflumaybepretty
Kobereturnedtohishometownafterhecouldbewithhisfianceandrestoretohealthsoon.
Itissaidthatalmostallvegetableshavingabitter______aregoodtohealth.
Atthesametime,thedrugitselfisundergoinganimagemakeover,instepwiththehealthandenvironmentalconsciousnessofth
我国金融改革的不断深化将为外资银行与中资银行的合作带来新的机遇。银监会鼓励外资银行通过参股中资银行,在业务、客户和市场方面获得突破;同时,在公司治理、内控、风险管理和经营理念方面带来先进的经验和做法,使中、外资银行在合作中共同获得发展。作为深化金
下面你将听到的是一段有关海洋的讲话。海洋是全球生命支持系统的一个不可缺少的组成部分。海洋不仅是自然资源的宝库,同时也是我们人类居住环境的重要调节器。中国政府高度重视海洋的开发和保护,不断加强海洋综合管理,促进海洋产业的协调发展。中国已经
A、Induction.B、Deduction.C、CauseandEffect.D、ComparisonandContrast.D听力材料中的信号词往往能够帮助应试者对整个语篇的逻辑结构进行判断。此文前一部分介绍股票的两种操作形式,中间用
随机试题
特发性血小板减少性紫癜最主要的发病机制是()。
细集料塑性指数为()时,宜采用石灰稳定。
项目结构图、组织结构图和合同结构图的涵义不同,其表达的方式也有所不同。下图反映了一个建设项目的业主与总承包商,以及总承包商与分包商之间的某种关系,这种关系是()。
如果境内上市外资股公司前一次发行的股份未募足,不可以申请增发。()
清代从摹习古法掌握前人经验与程式人手的绘画教科书是()。
在平面直角坐标系中,点P(一4,5)关于原点对称的点的坐标为().
对文中第二段加粗的“此”字,理解正确的一项是:根据原文所给信息,以下推断正确的一项是:
CrypticColoringCrypticcoloringisbyfarthecommonestuseofcolorinthestruggleforexistence.Itisemployedforthe
Shebrokeoffwithalittleshudder.ItwasarelieftoFramtonNuttelwhentheauntbustledintotheroomwithawhirlofapolo
Therewere150______attheinternationalconferencethissummer.
最新回复
(
0
)