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
It often seems that some possess superhuman eating powers, allowing them to down an entire pizza while remaining rail-thin. Othe
It often seems that some possess superhuman eating powers, allowing them to down an entire pizza while remaining rail-thin. Othe
admin
2019-04-27
31
问题
It often seems that some possess superhuman eating powers, allowing them to down an entire pizza while remaining rail-thin. Others only need to think of a slice and gain five pounds. Now one doctor says there’s evidence that genetics could be behind some of these differences. Regardless of how much you eat, your weight may be out of your hands.
Vann Bennett, a biochemist at Duke University and his team led a new investigation and discovered why this happens. They engineered mice to have several common modifications of the gene found in humans. They observed that mice who had mutations of ankyrin-B took more glucose (葡萄糖) into their fat cells, which in turn made more fat. Typically, the cell membrane (膜) acts as a barrier to prevent glucose from entering these cells: the alteration kept the gate open.
The change may serve a useful purpose. "Probably this is not always a bad thing," Bennett told Newsweek. "It could help people survive famines in the past. But today we have so much food that it probably is a bad thing." Our modern diets of fast food drive-thru windows and aisles of packaged snacks make the alteration work against us.
Dieters have long been told to watch their calories and exercise more, but this new finding suggests that a blanket approach doesn’t work for everyone. And the study illustrates a common problem for people: increased weight gain as a function of age. Our metabolism naturally slows with age, making it harder to maintain the weight of our 30-year-old selves when we’re 50. Now add an unruly ankyrin-B gene, and it may seem impossible to stay slim.
The mice in the study gained more weight when on high-fat diets. Bennett believes this is because once the fat cells received the glucose and start making more fat, they become sensitive to other fat. Despite being studied in mice, the researchers believe further research on this gene, and possibly others, could potentially create a field of customized diets and health plans based on genetics. Bennett envisions such assessments being performed at birth one day. For now, frustrated dieters can take comfort with one saying: It’s not you, it’s your genes.
Why is it more difficult to stay slim when we are older?
选项
A、Because we all lack exercise.
B、Because we watch our calories less.
C、Because we have ankyrin-B genes.
D、Because our metabolism slows down.
答案
D
解析
转载请注明原文地址:https://jikaoti.com/ti/uL7FFFFM
0
大学英语四级
相关试题推荐
Directions:Collegestudentshavelongbeenasocialfocus.Eachyearwecanfindthatmanyundergraduatescannotfindagoodjo
Directions:Inrecentyears,manycompaniesareinclinedtorecruitexperiencedemployeesbecausetheycanreducetrainingcost
A、Itwascreatedmainlyforscientificresearch.B、Itworksbetterinfineweatherconditions.C、Itmustbelocatedonatleast
A、Daysaregettinglonger.B、Daysaregettingshorter.C、Timebecomeseasiertofill.D、Itisagoodopportunitytodevelopthei
A、Herhusbandhadgotahigherposition.B、Herhusbandhadlosthisjob.C、Shewantedtohaveacleanerhouse.D、Shewantedtom
7SecretTestsofAttractionA)You’reasmart,attractiveperson.Soyouwouldn’tbesurprisedifoneofyourfriendsgottheh
Womenareonthevergeofoutnumberingmenintheworkforceforthefirsttime,ahistoricreversalcausedbylong-termchanges
Thereisapopularbeliefamongparentsthatschoolsarenolongerinterestedinspelling.Thisis,however,a【C1】______.Nosch
ThingsYouCan’tSayinCanadaA)Attackingoursacredcows(thingsorpeoplethatcannotbecriticized)mayturnyouintoo
A、Duringthesummermonths.B、Duringthespringmonths.C、Duringthewintermonths.D、Duringtheautumnmonths.C短文提到,美国职业篮球赛冬季在
随机试题
Evaluateyoursituationcoldlyandanalytically,andnotasa"lifeordeath"situation.
A、Theroomisonfire.B、Themanisbotheredbythesmoke.C、Thereisverylittlebreeze.D、Themanisnotpermittedintheroom
A.肝前型B.肝后型C.窦前阻塞D.窦后阻塞肝炎后肝硬变所引起的门静脉高压症属于
机械接口作业应遵守()规定
()是项目区别于作业的一个重要特点。
整合营销传统战略的最终目标是“通过与利益相关者形成更密切的关系而共享企业价值。()”
广华公司2006年12月1日购入的一项环保设备,原价为2000万元,使用年限为10年,会计处理时按照直线法计提折旧,税法规定按双倍余额递减法计提折旧,设备净残值为0。2008年末企业对该项固定资产计提了80万元的固定资产减值准备,广华公司所得税税率为25%
首次提出公共物品概念的经济学家是()。
一般资料:求助者,女性,27岁,未婚,某公司职员。案例介绍:多年前求助者的母亲因病去世,几年前自己的一位远房表姐在生小孩时因意外去世,求助者对生病、住院等非常恐惧,生怕自己也患病。不知从什么时候起,不知不觉中总是不停地洗手,有时甚至一天要洗上百遍。父亲、
有下面的程序段:x=InputBox(“字符串”,“输入”,“请输入”)Printx如果执行上面程序段时没有从键盘输入任何内容就直接按了回车键,则输出内容是
最新回复
(
0
)