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
For most people, fat is a burden. It doesn t really matter where it appears, we just don’t want it. But it turns out that our bo
For most people, fat is a burden. It doesn t really matter where it appears, we just don’t want it. But it turns out that our bo
admin
2012-08-05
36
问题
For most people, fat is a burden. It doesn t really matter where it appears, we just don’t want it. But it turns out that our bodies also make a unique form of fat tissue that behaves remarkably unlike any other: rather than storing excess energy, this fat actually burns through it. It’s called brown fat and health experts confirm for the first time that healthy adults have stores of this tissue, which researchers hope to study further as a potential new weight-loss treatment.
Human newborns have been known to have any significant deposits of brown fat, so called because of its abnormally high concentration of dark-colored mitochondria (线粒体), the engines that sustain cell activity. The primary purpose of brown fat is to regulate body temperature: the mitochondria-packed cells are designed to burn high quantities of sugar, and release that energy as heat—a mechanism that newborns rely on to keep themselves toasty.
As people age, however, the body becomes better at regulating temperature, so brown-fat stores shrink and white fat starts to emerge. A research team in Sweden has found that healthy adults retain a sizable amount of fat in the front and back of the neck expressing the same proteins as brown fat.
Identifying the presence of brown fat is one thing, but activating it to burn more sugar is another. Two studies confirmed that brown-fat cells become more active in the cold. But before we consider joining the Polar Bear Club, can brown fat actually cause weight loss? Brown fat may indeed allow a person to burn more calories with the same amount of consumption. On the basis of animal models, researchers calculate that 50g of brown fat could burn about 20% daily calorie an average person takes in. Leaner people tended to have more brown-fat deposits than overweight individuals. Interestingly, women were twice as likely as men to have active brown fat.
Still, the findings don’t necessarily mean that activating brown fat leads to a slimmer waist. For one thing, the body is especially good at maintaining balance, which is why a boost in calorie-burning can often make a hunger signal and prompt people to eat more to make up for the loss. And even if drug companies could find a way to activate brown fat safely, that excess activity could throw off other metabolic (新陈代谢的) systems and damage your health.
Why does brown fat get smaller as people age?
选项
A、People are getting older and older.
B、We have a new kind of fat-white fat.
C、We don’t need it to regulate our temperature any more.
D、The humans only have it in the front and back of the neck.
答案
C
解析
细节推断题。题干中的get smaller是定位句中shrink的同义表达。定位句提到,随着年龄的增长,身体越来越善于调节体温,棕色脂肪含量也会下降。由此推断,C)符合文意。
转载请注明原文地址:https://jikaoti.com/ti/kXrFFFFM
0
大学英语六级
相关试题推荐
AlexisdeTocqueville,theFrenchpoliticalscientistismostfamousforhisfour-volumebook,"DemocracyinAmerica".In1831,
Theincreaseinglobaltrademeansthatinternationalcompaniescannotaffordtomakecostlyadvertisingmistakesiftheywantt
A、Sheisexpectingherturn.B、Shehasfoundvaluableinformation.C、Sheneedsanotherweektoprepare.D、Shehasnetpreparedy
TheactofGooglingoneselfhasbecomethedigitalage’sleadingguiltypleasure--anactivityenjoyedbyallandadmittedbyfew
IwenttoaCatholicboysschoolinBlackpoolintheNorthofEngland.InmyfirstyearintheseniorschoolIwasanerdykid,
A、Providemoreoutdoorclothingandapparatus.B、Turntheirattentiontofemalecustomers.C、Maketheshoppingareaascomfortab
A、Hegainedfullsupportfromhisparents.B、Heputmoneyinahighinterestaccount.C、Hecutexpensesonentertainment.D、Hew
A、Lookingforanapartment.B、Takingasuburbanexcursion.C、Lookingforajob.D、Askingthemanforhisopinions.A综合理解题。女士对男士说
Havinganimportantappointment,Ilefttheofficeearlierthanusualthismorning______trafficjam.
Theresponsetoourfinancialappeal______anythingweexpected.
随机试题
在《民用建筑隔声设计规范》(GBJ118-1988)中规定的住宅分户墙空气声隔声性能(隔声量)的低限值是多少?[2009年第6题]
某男性患者,17岁。运动中不慎摔伤,造成右侧下颌角完全性骨折,检查可见:骨折线由磨牙后斜向下前方,骨折端表现为()
外感风热兼见咳嗽胃热烦渴、呕哕
A.氟西汀B.美沙酮C.艾司唑仑D.齐拉西酮E.艾斯佐匹克隆因左旋体引起不良反应,而右旋体已上市,具有短效催眠作用的药物是()。
A.支气管哮喘发作时,极度呼吸困难B.甲状腺功能亢进手术治疗后C.行颅骨牵引时D.会阴部检查时E.产妇胎膜早破时头低脚高位常用于
某建设项目投资构成中,设备及工器具购置费为500万元,建筑安装工程费为1800万元,建设工程其他费用为100万元。本项目预计建设期为3年,初步估算假定,建筑安装工程费在建设期内每年等额投入,设备及工器具购置费和建设工程其他费用在第三年投入,基本预备费率为1
关于同一控制下的企业合并,下列说法中正确的有()。
某单位开展有关低碳生活的调查活动,结果显示,使用太阳能热水器的有36人,选乘公共交通工具上下班的有21人,购物自备购物袋的有47人。经统计发现三个问题均为肯定答案的有4人,仅有两个问题为肯定答案的有46人,三个问题均为否定答案的有15人。那么,参加调查的总
以下说法错误的是()。
班级舆论能积极促进学生的思想品质。()
最新回复
(
0
)