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
2023-08-29
66
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 the fourth paragraph, 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 of 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)为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2966464.html
相关试题推荐
[originaltext]Ifyouarelikemostpeople,yourintelligencevariesfromse
[originaltext]Ifyouarelikemostpeople,yourintelligencevariesfromse
[originaltext]Ifyouarelikemostpeople,yourintelligencevariesfromse
[originaltext]Afewmonthsago,millionsofpeopleinLondonheardalarmsa
Acidrainisaveryseriousairandwaterpollutionproblem.Manypeoplefee
Acidrainisaveryseriousairandwaterpollutionproblem.Manypeoplefee
Acidrainisaveryseriousairandwaterpollutionproblem.Manypeoplefee
[originaltext]W:Youknow,I’veoftenwonderedwhypeoplelaughatthepicture
[originaltext]W:Youknow,I’veoftenwonderedwhypeoplelaughatthepicture
[originaltext]W:Youknow,I’veoftenwonderedwhypeoplelaughatthepicture
随机试题
[originaltext]W:Isthisthebusthatgoesbythemall?M:No,itisn’t.Butyo
SNMPc支持各种设备访问方式,在SNMPc支持的设备访问方式中,只是用于对TC
如果一个配置项的版本号为1.1,那么这个配置项处于()状态。A.草稿 B.正式
氧瓶使用后,瓶内应保留1kg/c㎡的剩余压力,目的在于A.外界杂质不易进入瓶内
限流式熔断器瓷熔断件损坏时,无论填充料是否泄露,都必须更换熔断器。
在信号源(uS,RS)和电阻RL之间插入一个理想变压器,如图所示,若电压表和电流
最易发生抗原变异的病毒是()A.流行性感冒病毒 B.腮腺炎病毒 C.乙型肝炎
(2019年真题)以下选项中,()最接近现实中的完全垄断。A.邮政 B.电力
男,50岁。患肝硬化腹水9年。1月来腹部明显膨胀,尿量400~500ml/日。3
以出让方式取得国有土地使用权的建设项目,建设单位应当持建设项目的批准、核准、备案
最新回复
(
0
)