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
Eat to Live A meager diet may give you health and long life, but it’s not much fun—and it might not even be necessary. We ma
Eat to Live A meager diet may give you health and long life, but it’s not much fun—and it might not even be necessary. We ma
admin
2015-07-05
22
问题
Eat to Live
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, Lifespan 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、drugs do not have the effects of calorie restriction
B、dieting is not a good method to give us health and long life
C、seeing the effect of a diet, people will like to eat less than normal
D、calorie restriction is very important to young people
答案
B
解析
文章的最后两段谈及Spindler对节食的看法。首先,他不能肯定节食是否值得。其次,他希望在不久的将来,我们不必节食。所以我们可以推知,他认为节食不是得以健康长寿的好办法。
转载请注明原文地址:https://kaotiyun.com/show/zDQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
HealthyFoodStreetsellers,particularlyindevelopingcountries,supplylargeamountsoffood(51)peopleonlowincomes.Thi
Hearingproblemsmaybealleviatedbychangesindietandexercisehabits.
1.Medicineisthescienceandartofhealing.Itisasciencebecauseitisbasedonknowledgegainedthroughcarefulstudyand
FlyingintoHistoryWhenyouturnonthetelevisionorreadamagazine,celebrities(名人)areeverywhere.Althoughfameandt
TheUSfacessevereeconomicproblems.
Duringthe1800’sandearly1900’s,newacademicdisciplinessuchaschemistryandphysicsmadegreatheadway.
ReinventingtheTableAnearthscientisthasrejiggedtheperiodictabletomakechemistrysimplertoteachtostudents.(46)But
ThepoetWilliamCarlosWilliamswasaNewJerseyphysician.
WhatisChineseNewYear?InmanypartsofAsia,nationsfollowthelunarcalendarratherthantheGregoriancalendarusedb
随机试题
收集胃、肠、脾、胰血液回流的静脉血管是()
在搅拌水泥混温土混合料时,宜按()的顺序投料。
水利工程建设发生重大质量与安全事故后,必须迅速,有效地实施先期处置,防止事故进一步扩大的单位是()。
输入期初余额时,上级科目的余额和累计发生数据需要手工输入。()
财产保险属于客户可能提出的其他要求中的哪项?()。
甲公司为房地产开发企业,2×20年发生有关房地产投资的资料如下:(1)1月1日购入一块土地,并开始在其上建造一栋用于对外出租的写字楼,购入当日董事会即作出完工后对外出租的书面决议,但尚未签订租赁合同。该项土地购买价款为1200万元。为购建写字楼占用了2
根据助人自助的理念,在某个家庭面临贫困时,社会工作者的服务内容包括()。
讲授法意味着灌输式教学。
油价上涨给社会生产和人民生活造成影响。你认为应如何应对?
()对于严寒相当于军队对于()
最新回复
(
0
)