首页
登录
职称英语
It often seems that some possess superhuman eating powers, allowing them
It often seems that some possess superhuman eating powers, allowing them
游客
2024-01-23
29
管理
问题
It often seems that some possess superhuman eating powers, allowing them to down an entire pizza while remaining rail-thin. Others only need to think of a slice and gain five pounds. Now one doctor says there’s evidence that genetics could be behind some of these differences. Regardless of how much you eat, your weight may be out of your hands.
Vann Bennett, a biochemist at Duke University and his team led a new investigation and discovered why this happens. They engineered mice to have several common modifications of the gene found in humans. They observed that mice who had mutations of ankyrin-B took more glucose (葡萄糖) into their fat cells, which in turn made more fat. Typically, the cell membrane (膜) acts as a barrier to prevent glucose from entering these cells; the alteration kept the gate open.
The change may serve a useful purpose. "Probably this is not always a bad thing," Bennett told Newsweek. "It could help people survive famines in the past. But today we have so much food that it probably is a bad thing." Our modern diets of fast food drive-thru windows and aisles of packaged snacks make the alteration work against us.
Dieters have long been told to watch their calories and exercise more, but this new finding suggests that a blanket approach doesn’t work for everyone. And the study illustrates a common problem for people: increased weight gain as a function of age. Our metabolism naturally slows with age, making it harder to maintain the weight of our 30-year-old selves when we’re 50. Now add an unruly ankyrin-B gene, and it may seem impossible to stay slim.
The mice in the study gained more weight when on high-fat diets. Bennett believes this is because once the fat cells received the glucose and start making more fat, they become sensitive to other fat. Despite being studied in mice, the researchers believe further research on this gene, and possibly others, could potentially create a field of customized diets and health plans based on genetics. Bennett envisions such assessments being performed at birth one day. For now, frustrated dieters can take comfort with one saying: It’s not you. it’s your genes. [br] How did a mouse gain weight with mutations of ankyrin-B?
选项
A、The fat cells in the mouse would take more glucose to create more fat.
B、The cell membrane in the mouse could open the gate of fat into the mouse.
C、The glucose could function as a barrier to prevent the fat from reducing.
D、The ankyrin-B could make the mouse eat more.
答案
A
解析
推理判断题。定位句指出,那些拥有锚蛋白B基因突变的老鼠将更多的葡萄糖吸收到它们的脂肪细胞中,因而产生更多脂肪,这与A项所述一致,故答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/3387818.html
相关试题推荐
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
Thequalityofpatiencegoesalongwaytowardyourgoalofcreatingamore
随机试题
Itisnotlongsinceconditionsinthemineswereworsethantheyarenow.T
[originaltext]M:DoreportersfornewspaperslookdownonreportersfromTVand
MarriageisconsideredanoccasionofgreatrejoicingintheWestasitisi
基本分析法的特点是分析()。A、价格变动长期趋势B、宏观因素C、价格变动根本原因D、价格短期变动趋势A,B,C基本分析以供求决定价格为基本理念
—个完整的足球接球动作,一般包括四个技术环节,其顺序是()。A.接球前的
属于骨折早期并发症的是:A.急性骨萎缩 B.骨筋膜室综合症 C.缺血性
光辉之于()相当于正义之于()。A.太阳;法制 B.恒星;民生 C.自然
关于2018年组建的司法部的机构设置和编制管理,下列说法正确的是?A.司法部在职
民间非营利组织接受捐赠后,因无法满足捐赠所附条件而将部分捐赠退还给捐赠捐赠人时,
医师经执业注册后 A.只准从事医疗业务 B.只准从事预防业务 C.可以从事
最新回复
(
0
)