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
2013-07-20
56
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.
The word "toasty" (Line 5, Para. 2)has the same meaning with______.
选项
A、warm
B、delicious
C、comfortable
D、tedious
答案
A
解析
语义理解题。第二段介绍棕色脂肪的主要功能是调节体温,通过燃烧脂肪来获取热量,并进一步解释这种机制是新生儿保持体温的方法。联系上下文可知,toasty与A)“温暖的”同义。
转载请注明原文地址:https://kaotiyun.com/show/JZn7777K
0
大学英语六级
相关试题推荐
PartⅡReadingComprehension(SkimmingandScanning)Directions:Inthispart,youwillhave15minutestogooverthepassageq
IntheUnitedStates,thefirstdaynurserywasopenedin1854.Nurserieswereestablishedinvariousareasduringthe【C1】______
Parentsareoftenupsetwhentheirchildrenpraisethehomesoftheirfriendsandregarditasaslur(诽谤,中伤)ontheirowncooki
A、Inshorthand.B、Inshortphrases.C、Indirectquotations.D、Inthestudent’sownwords.D选项均以In开头表明,本题可能考查方式方法。短文中提到了为避免剽窃现象而采
Foryearsthemedia,foodlabels,dietitians,andevenscientistswhoshouldknowbetterhavebombarded(轰炸)uswithadvicetol
EarthquakePreparednessOneofthemostfrighteninganddestructivephenomenaofnatureisasevereearthquakeanditsterri
Smokingisverypopularwithpeople.【C1】______ofthesmokersbelievethatsmokingcan【C2】______theirnerveshardenedwithsoci
A、Thereisnothingwrongwithdiet.B、Oneshouldcombinedietwithexercise.C、Exercisedoesmoregoodthandietdoes.D、Dietdo
A、Bicycleshavespeciallaneseverywhere.B、Bicyclesandcarsarehavingmoreaccidents.C、Bikepathsareconvenientforbicycli
Directions:Forthispart,youareallowed30minutestowriteashortessayentitledBuyingandSellingStocksasaStudent.Yo
随机试题
行政管理除必须依照宪法、法律、行政法规、行政规章等对国家事务和社会公共事务管理外,还由()授权,管理公务,对公众负责。
会计核算的环节包括()。
Nothing in my life moved me( )this first visit to China.
法定福利包括( )。
某公司高级工程师陈先生2009年3月取得如下收入:(1)工资收入7000元;(2)一次性稿费收入5000元;(3)一次性讲学收入500元;(4)一次性翻译资料收入3000元;(5)到期国债利息收入1286元;
2009年3月,美国汤姆公司与中国天元公司订立合同,约定汤姆公司以现金、机器设备和专有技术作价800万美元出资,天元公司以现金、场地使用权、厂房作价200万美元出资,在中国上海设立一家中外合资经营企业。(1)汤姆公司由合营企业提供担保向银行贷款2
如果石油供应出现波动导致国际油价上涨,在开放市场国家,如美国,国内油价也会上升,不管这些国家的石油是全部进口还是完全不进口。以上论述最能支持以下哪个结论?
设位于第一卦限的曲线y=f(χ)上任一点P(χ,y)的切线在χ轴上的截距等于该点法线在y轴上截距的相反数,且曲线经过点(1,0),求该曲线.
设有关系R(A,B,C)和S(A,D),则自然连接运算结果中的元数应为
AMessontheLadderofSuccessA)ThroughoutAmericanhistorytherehasalmostalwaysbeenatleastonecentraleconomicnarrati
最新回复
(
0
)