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
98
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
Manywriterscomplainthattheirbiggestdifficultyisfindingasubject.Sometimesthatdifficultyappearslesscomplicatedbec
Manywriterscomplainthattheirbiggestdifficultyisfindingasubject.Sometimesthatdifficultyappearslesscomplicatedbec
Manypeople--especiallythebaby-boomersbornbetween1946and1964,whowillberetiringoverthenext20yearsorso--will
Manypeople--especiallythebaby-boomersbornbetween1946and1964,whowillberetiringoverthenext20yearsorso--will
A、Theythinkthatitissimilartofruitcake.B、Theyregarditasakindofnourishingfood.C、Theyhaveanumberofcomplaints
A、Itwassettledmorethan300yearsago.B、AlexanderGrahamBellvisitedthere.C、Alargenumberofitsresidentsweredeaf.D、
Inallone’slifetimeitisoneselfthatonespendsthemosttimebeingwithordealingwith.Butitis【C1】______oneselfthato
EntertainmentinLondonBuyingBooksLondonersaregreatreaders.Theybuyvastnumbersofnewspapersandmagazinesan
随机试题
社会保险的保护对象为()
A、Allanimalsinthebush.B、Theremnantofthesameprimevalprogramming.C、Thesameprimevalprogramming.D、Allanimalsinthe
女,51岁,教师。因突然剧烈头痛、呕吐,伴一过性意识不清2h入院。患者于2h前因情绪激动后突然出现全头部剧烈疼痛,呈撕裂样,难以忍受,伴呕吐4~5次,当时一过性意识不清,约10min后恢复正常,并伴四肢抽搐发作1次,无尿失禁及舌咬伤,醒后无明显言语障碍,四
环形铁粒幼细胞主要见于
以下说法正确的是
流行病学研究工作的三个阶段是
王某过世后留下的6间房屋应由哪些人分配?各自应分得多少?为什么?如朱某要求履行与曹某签订的合同,取得该房屋,其要求能否得到支持?为什么?
留存收益包括盈余公积和资本公积。()
情报是指运用一定的媒体(载体),越过空间和时间传递给特定用户,以解决科研、生产、经营中的具体问题所需要的特定知识和信息。根据以上定义,以下不属于情报的是:
Poetrycanbecomparedtopainting.Whenyoulookataworkofart,youfirstseeitforwhatitis—adepictionofaperson,an
最新回复
(
0
)