首页
登录
职称英语
For most people, fat is a burden. It doesn’t really matter where it appears,
For most people, fat is a burden. It doesn’t really matter where it appears,
游客
2024-05-20
36
管理
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. [br] 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://tihaiku.com/zcyy/3603659.html
相关试题推荐
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
Olderpeoplewhoholdtemporaryorpart-timejobsafterretirementenjoybet
随机试题
1 Divorceisoneofthosecreations,likefastfoodandliterock.thathavemo
Wheredoesthisconversationprobablytakeplace?[br][originaltext]M:Thisis
Wearenotshortofrawmaterialsatthemoment,butweneedreliable(equip)____
试述杂志传播的优点和弱点。
在施工中块体大小必须与混凝土制备、运输和浇筑的生产能力相适应,即要保证在混凝土初
经验主义课程理论流派的主要代表人物是( )。A.斯宾塞 B.杜威 C.赫钦
下列历史人物中,存在师生关系的有( )个。 ①苏轼——秦观②孔子——曾子③李
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
(2015年真题)静脉注射青霉素的适宜溶媒是( )。A.0.9氯化钠注射液
集体劳权不包括( )A.劳动报酬权 B.集体谈判权 C.民主参与权 D.
最新回复
(
0
)