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
54
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
Witnesseswereallegedlytorturedorsubjectedtopressuretofabricateevidenceagainsthim.
Accordingtothearticle,whatcontributestothepopulationincrease?Whatdoes"tolimittheirreproduction"inthelastpara
ThecurrentemergencyinMexicoCitythathastakenoverourlivesisnothingIcouldeverhaveimaginedformeormychildren.
ThecurrentemergencyinMexicoCitythathastakenoverourlivesisnothingIcouldeverhaveimaginedformeormychildren.
Imagineaworldinwhichtherewassuddenlynoemotion--aworldinwhichhumanbeingscouldfeelnoloveorhappiness,noterror
Imagineaworldinwhichtherewassuddenlynoemotion--aworldinwhichhumanbeingscouldfeelnoloveorhappiness,noterror
Accordingtoasurvey,whichwasbasedontheresponsesofover188,000students,today’straditional-agecollegefreshmenare"
Oneofthemostwidelydiscussedsubjectsthesedaysisenergycrisis.Automobiledriverscannotgetgasoline;homeownersmayno
随机试题
网络营销
Myhometownisfound______.
60岁女性病人,5天前受凉感冒后自服速效伤风胶囊片,从昨天开始小便呈深橘黄色,现疲乏,活动后心慌,偶感腰痛。体检:贫血貌,巩膜轻度黄染,肝脾肋下未及,皮肤黏膜完整,生命体征正常,既往无特殊病史。实验室检查:RBC2.13×1012/L、WBC5.6×109
某企业为增值税一般纳税人。2015年12月25日,向职工发放一批自产的空气净化器作为福利,该批产品售价为10万元,生产成本为7.5万元,按计税价格计算的增值税销项税额为1.7万元。不考虑其他因素,该笔业务应确认的应付职工薪酬为()万元。(2016年
用“到达理论”替代“距离理论”,为的是强调物流服务的本质是将商品送达到用户手中,而不是强调其克服空间距离的作用。()
消费物价指数
19世纪下半期,沙俄割占中国领土150多万平方公里,是通过下列()不平等条约实现的。
有以下程序:#include<stdio.h>main(){intc;while((c=getchar())!=’\n’)switch(c-’2’){case1:putchar(c+4);c
RelationshipTalkingPoints:SpeakYourSpouse’sLanguageA)AnnaandMikePetersonrecentlyhaddinnerattheirfavouritesteakh
A、Eachstudentwasresponsibleforonestory.B、Computerstudentsfirsthadtodecidewhetherastorywasgoodornot.C、Webpage
最新回复
(
0
)