首页
登录
公务员类
When we eat may be just as important as
When we eat may be just as important as
题库
2022-08-02
31
问题
When we eat may be just as important as what we eat. A new study shows that mice that eat when they should be sleeping gain more weight than mice that eat at normal hours. Another study sheds light on why we pack on the pounds in the first place. Whether these studies translate into therapies that help humans beat obesity remains to be seen, but they give scientists clues about the myriad factors that they must take into account. Observations of overnight workers have shown that eating at night disrupts metabolism and the hormones that signal we’re sated. But no one had done controlled studies on this connection until now. Biologist Fred Turek of Northwestern University in Evanston, Illinois, and graduate student Deanna Arble examined the link between a high-fat diet and what time of day mice eat. A control group of six nocturnal mice ate their pellets (60% fat by calories, mostly lard) during the night. Another group of six ate the same meal during the day, Turek says, which disrupts their circadian rhythm—the body’s normal 24-hour cycle. After 6 weeks, the off-schedule mice weighed almost 20% more than the controls, Turek and Arble report today in?Obesity, supporting the idea that consuming calories when you should be sleeping is harmful. Turek and Arble acknowledge that the disrupted mice ate a tad more and were a tad more sluggish, but the differences could not account for all of the weight gain. In the second study, a different team of researchers investigated the link between weight and the immune system. Hundreds of genes seem to affect the accumulation of fat, but one that helps protect us from infection might help us lose weight with little effort, biochemist Alan Saltiel of the University of Michigan, Ann Arbor, and colleagues suggest today in?Cell. The researchers tested me weight-adding abilities of a protein called IKK∈, which is linked with obesity, diabetes, and chronic, low-1evel inflammation. For 3 months, the team fed six mice missing IKK∈ genes a diet of high-fat chow. Because IKKE’s main job is immune defense, Saltiel’s team didn’t expect to find weight differences between knockout mice and controls. But the knockout mice did gain significantly less. Best of all, the girth the animals did add was less harmful to their overall health. “The knockout mice don’t gain as much weight but also don’t get diabetes, don’t get insulin resistance, and don’t get accumulation of lipids on the liver,” Saltiel says, all of which contribute to the suite of health problems associated with being overweight. Saltiel calls IKK∈ “an especially appealing drug target for the treatment of metabolic disease.” Tom Maniatis, a molecular biologist at Harvard University praises the study but remains skeptical about any drug that would inhibit IKK∈. He helped develop the mice used in the experiment and notes that they are vulnerable to the flu. He suspects that suppressing IKK∈ may help people with diabetes or obesity, “but the first time the swine flu comes along, that’s it.” Researchers are also enthusiastic about the circadian rhythm paper Frank Scheet, a neuroscientist at Harvard who studies sleep, was struck that “you could see something happening [to the disrupted mice] in the first week already. That’s consistent with human studies where we found changes in just 3 days.” Together, the papers suggest that there’s no simple answer to why people gain weight. Says Turek, “It’s clearly not just calories in versus calories out.”Which of the following is the best title for this passage?A.IKK∈: an appealing drug target for losing weight.B.Teach you how to lose weight.C.New researches about losing weight.D.Calories in versus calories out.
选项
A.IKK∈: an appealing drug target for losing weight.
B.Teach you how to lose weight.
C.New researches about losing weight.
D.Calories in versus calories out.
答案
C
解析
文章通过两个试验论述了体重和饮食规律及免疫系统之间的关系,通过这些最新的科学试验来寻求一种有效的减肥方式。C选项最恰当。A选项不正确,文章并不是只论述了IKK∈,而且也并不是是一种有效的减肥药。B不恰当,文章并没有教人们如何减肥的,只是探讨了影响体重的一些因素。D选项文中没有涉及。
转载请注明原文地址:https://tihaiku.com/gongwuyuan/2635066.html
本试题收录于:
英语言文学 军队文职题库军队文职人员招聘分类
英语言文学 军队文职
军队文职人员招聘
相关试题推荐
_____isthelastimportantnovelistand
TheMidwestisAmerica’smostimportant
Whenweeatmaybejustasimportantas
Whenweeatmaybejustasimportantas
Whenweeatmaybejustasimportantas
Whenweeatmaybejustasimportantas
Whenweeatmaybejustasimportantas
TheMidwestisAmerica′smostimportant
()isAustralia’smostimportantindustr
随机试题
Readcarefullythefollowingexcerpt,andthenwriteyourresponseinNOLES
社会主义道德建设的核心是( )A.爱国主义 B.集体主义 C.社会主义
我国小水电资源分布广泛,技术可开发量超过1.28亿千瓦,居世界()。A.首位
粉末镜检可见乳管的药材是A.人参B.川芎C.白芷D.党参E.柴胡
用于抗原或抗体的定性、组成和两种抗原相关性分析的方法是A.双向免疫扩散B.间接凝
油浸变压器有载开关呼吸器硅胶筒玻璃破损属于严重缺陷。
避雷针特殊巡视的内容有(____)气温骤变后,避雷针本体无裂纹,连接接头处无开裂
固体表面氧和物质直接燃烧属于()。A.动力燃烧 B.表面燃烧 C.分解燃烧
关于冻结单位存款的利息计算,说法正确的是( )。A.被冻结的款项,在冻结期间均
在学校教育中,起关键作用的是()。 A.教学媒体B.教师C.学生D.教
最新回复
(
0
)