首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Imagine eating everything delicious you want—with none of the fat. That would be great, wouldn’t it ? New "fake fat" product
Imagine eating everything delicious you want—with none of the fat. That would be great, wouldn’t it ? New "fake fat" product
admin
2016-06-22
47
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(营养物)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(肠道)"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 blood stream.
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.
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
从文章的第六段可以看出,olestra会阻止维生素A、D、E、K的吸收,也会阻止类胡萝卜素的吸收,而类胡萝卜.素可以减少癌症、心脏病等的发病率,因此olestra的一个消极作用是增加患癌的风险。
转载请注明原文地址:https://kaotiyun.com/show/GSQi777K
0
在职申硕(同等学力)英语
相关试题推荐
TodayblackchildreninsouthAfricaarestillreluctanttostudysubjectsfromwhichtheywereeffectivelybarredforsolong.
A:Thatwasadeliciousmeal,Mrs.Barr.Thankyouverymuch.B:______
InflationwillreachitshighestinadecadeacrossmostofAsiathisyear,threateningto______recentproductivitygains.
ThecurrentemergencyinMexicoCitythathastakenoverourlivesisnothingIcouldeverhaveimaginedformeormychildren.
ThecurrentemergencyinMexicoCitythathastakenoverourlivesisnothingIcouldeverhaveimaginedformeormychildren.
Imagineaworldinwhichtherewassuddenlynoemotion--aworldinwhichhumanbeingscouldfeelnoloveorhappiness,noterror
Accordingtoasurvey,whichwasbasedontheresponsesofover188,000students,today’straditional-agecollegefreshmenare"
Respectforeachother’ssovereigntyandnon-interferenceineachother’sinternalaffairs______thefundamentalprinciplesgui
Oneofthemostwidelydiscussedsubjectsthesedaysisenergycrisis.Automobiledriverscannotgetgasoline;homeownersmayno
随机试题
求积分
男性,70岁,曾有乙肝病史,近3个月出现持续性腹胀,黄疸,查体时发现肝脏不大,脾脏中度肿大,腹水(+)。最可能的诊断为()
管理者为了实现项目管理目标而建立的绩效考核机制是为了更明确的解决项目管理目标的问题,以下()不属于项目目标管理问题。
不是组成工程建设监理费用的是()。
“内在价值”即“由证券本身决定的价格”,其含义有()。Ⅰ.内在价值是一种相对“客观”的价格Ⅱ.内在价值由证券自身的内在属性或者基本面因素决定Ⅲ.市场价格基本上是围绕着内在价值形成的Ⅳ.内在价值不受外在因素的影响
()投资者可以承受投资的短期波动,愿意承担因获得高报酬而面临的高风险。
合法行为和违法行为都可以引起法律关系的产生、变更和消灭。()
有三个关系R、S和T如下:则由关系R和S得到关系T的操作是
Exceptionalchildrenaredifferentinsomesignificantwayfromothersofthesameage.Forthesechildrentodeveloptotheirf
Whichofthefollowingcanreflecttheever-changingethnicstructureofAmerica?Theauthorofthepassagewantstotellthat
最新回复
(
0
)