首页
登录
职称英语
Imagine eating everything delicious you want—with none of the fat That would
Imagine eating everything delicious you want—with none of the fat That would
游客
2023-08-11
36
管理
问题
Imagine eating everything delicious you want—with none of the fat That would be great, wouldn’t it?
New "fake fat" products appeared on store shelves in the United States recently, but not everyone is happy about it. Makers of the products, which contain a compound called olestra, say food manufacturers can now eliminate fat from certain foods. Critics, however, say the new compound can rob the body of essential vitamins and nutrients and can also cause unpleasant side effects in some people. So it’s up to consumers to decide whether the new fat-free products taste good enough to keep eating.
Chemists discovered olestra in the late 1960s, when they were searching for a fat that could be digested by infants more easily. Instead of finding the desired fat, the researchers created a fat that can’t be digested at all.
Normally, special chemicals in the intestines(肠)"grab" molecules of regular fat and break them down so they can be used by the body. A molecule of regular fat is made up of three molecules of substances called fatty acids.
The fatty acids are absorbed by the intestines and bring with them the essential vitamins A, D, E, and K. When fat molecules are present in the intestines with any of those vitamins, the vitamins attach to the molecules and are carried into the bloodstream.
Olestra, which is made from six to eight molecules of fatty acids, is too large for the intestines to absorb. It just slides through the intestines without being broken down. Manufacturers say it’s that ability to slide unchanged through the intestines that makes olestra so valuable as a fat substitute. It provides consumers with the taste of regular fat without any bad effects on the body. But critics say olestra can prevent vitamins A, D, E, and K from being absorbed. It can also prevent the absorption of carotenoids(类胡萝卜素), compounds that may reduce the risk of cancer, heart disease, etc.
Manufacturers are adding vitamins A, D, E, and K as well as carotenoids to their products now. Even so, some nutritionists are still concerned that people might eat unlimited amounts of food made with the fat substitute without worrying about how many calories they are consuming. [br] What is a possible negative effect of olestra according to some critics?
选项
A、It may increase the risk of cancer.
B、It may spoil the consumers’ appetite.
C、It may impair the digestive system.
D、It may affect the overall fat intake.
答案
A
解析
第6段第5句提到“一些批评家认为Olestra阻止人体吸收维生素A、D、E、K和类胡萝卜素,而类胡萝卜素却是一种能减少癌症及心脏病发病率的化合物”,因此,A正确;B与文章所陈述之意相悖;C和D文中没有提及。
转载请注明原文地址:https://tihaiku.com/zcyy/2917754.html
相关试题推荐
[originaltext]Whydowecry?Canyouimaginelifewithouttears?Notonlydo
[originaltext]Whydowecry?Canyouimaginelifewithouttears?Notonlydo
[originaltext]M:Hi,Mandy.How’severythinggoing?W:Nottoogood,Isuppose.
[originaltext]M:Hi,Mandy.How’severythinggoing?W:Nottoogood,Isuppose.
[originaltext]Inthecaseofmobilephones,changeiseverything.Recentre
[originaltext]Inthecaseofmobilephones,changeiseverything.Recentre
Imagineeatingeverythingdeliciousyouwant—withnoneofthefatthatwould
Imagineeatingeverythingdeliciousyouwant—withnoneofthefatthatwould
DietingadvisorDr.RobertAtkinsrecommendseatingadiethighinproteinf
DietingadvisorDr.RobertAtkinsrecommendseatingadiethighinproteinf
随机试题
[originaltext]M:Oh,hi,thisbookisduetoday,andIamnotquitefinishedwi
Imaginingbeingaskedtospendtwelveorsoyearsofyourlifeinasociety
某桥梁工程项目,业主和承包人签订施工合同后,承包人在合同规定的时间内提供给监理工
建议行超声引导下穿刺活检明确诊断的是()。A.甲状腺多发结节伴甲亢 B.甲状
我国行政组织的层级制度最常见的是()。A.省长、市长、县长 B.部、局、处或
钢以外其他基材的热塑性粉末涂料单涂涂层厚度为()。A.0.28~0.70mm
患者,男性,35岁,发作性咳嗽、咳痰、喘息8年,加重1天。吸烟10年,每日10支
属于萜类的抗疟药为A.薄荷醇 B.龙脑 C.青蒿素 D.樟脑 E.奎宁
( )特指公司赠予经理人员的一种权利,持有这种权利的经理人可以在规定时间内以行
将二进制数11001转换成相应的十进制数。其正确结果是: A.25B.3
最新回复
(
0
)