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
2012-05-28
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.
According to Para. 4, we can safely draw the conclusion that______.
选项
A、it is totally impossible to lose weight by activating brown fat
B、our brown fat will be more active if we go to the North Pole
C、brown fat can surely make people thinner than before
D、an average person should eat 50g brown fat to keep fit
答案
B
解析
推理判断题。第四段主要说明激活棕色脂肪的方法以及其他一些研究结果。根据第二句,研究证实在寒冷的环境里,棕色脂肪细胞会变得更活跃,而北极非常寒冷,因此人们理所当然也认为如果去北极的话,体内的棕色脂肪会变得很活跃,可能更有助于减肥,故B)为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/SCE7777K
0
大学英语六级
相关试题推荐
A、MoreandmorepeopleareusedtotheInternet.B、CellponesareBecominganimportantpartofourlife.C、Postcardsareinthe
Manywriterscomplainthattheirbiggestdifficultyisfindingasubject.Sometimesthatdifficultyappearslesscomplicatedbec
Manypeople--especiallythebaby-boomersbornbetween1946and1964,whowillberetiringoverthenext20yearsorso--will
Manypeople--especiallythebaby-boomersbornbetween1946and1964,whowillberetiringoverthenext20yearsorso--will
Manypeople--especiallythebaby-boomersbornbetween1946and1964,whowillberetiringoverthenext20yearsorso--will
Inallone’slifetimeitisoneselfthatonespendsthemosttimebeingwithordealingwith.Butitis【C1】______oneselfthato
Inallone’slifetimeitisoneselfthatonespendsthemosttimebeingwithordealingwith.Butitis【C1】______oneselfthato
Inallone’slifetimeitisoneselfthatonespendsthemosttimebeingwithordealingwith.Butitis【C1】______oneselfthato
EntertainmentinLondonBuyingBooksLondonersaregreatreaders.Theybuyvastnumbersofnewspapersandmagazinesan
随机试题
男性,20岁。反复发作性四肢抽搐,口吐白沫,意识丧失,伴大小便失禁2年。脑电图示有痫波发放。下列哪种说法不正确
《江城晚报》记者张某在某报上发表一篇评论性文章,文中谈道:“江城文坛中,有的作家剽窃别人的作品当作自己的作品出版,有的作家昧着良心沦为有钱人的‘枪手’,文化素质和道德水平都有待大幅度地提高。”该报在江城所辖的甲、乙、丙、丁四个区发行。该市的作家陈某和李某认
简述物权的保护。
存量房查验和交接时,房地产经纪人员需要准备的材料不包括()。
总体来说,在建立风险识别系统时,要遵循的基本原则有()。
数学课上,教师教授“对称”这一概念时,采用了三种方式:用自己的话说出“对称”的意义;从一些图形中分别找出线对称和点对称图形;利用线对称和点对称的原理,在方格内设计美术字。该教师的做法旨在培养学生的()
轮船:大海
A.牙周探针B.尖探针C.洁治器D.刮治器E.骨锉清除龈上牙石时应使用()。
HewasnotasactiveasIhad______himtobe.
中国近代史上中国人民第一次大规模的反侵略武装斗争是()
最新回复
(
0
)