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" products
Imagine eating everything delicious you want—with none of the fat. That would be great, wouldn’t it? New "fake fat" products
admin
2012-02-02
42
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 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. (381 words)
Why are nutritionists concerned about adding vitamins to olestra?
选项
A、It may lead to the over-consumption of vitamins.
B、People may be induced to eat more than is necessary.
C、The function of the intestines may be weakened.
D、It may trigger a new wave of fake food production.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/JRna777K
本试题收录于:
艺术硕士(艺术基础)题库专业硕士分类
0
艺术硕士(艺术基础)
专业硕士
相关试题推荐
AskmostpeoplehowtheydefinetheAmericanDreamandchancesarethey’llsay,"Success."Thedreamofindividualopportunity
Inthe1950s,thepioneersofartificialintelligence(AI)predictedthat,bytheendofthiscentury,computerswouldbeconver
CarsaccountforhalftheoilconsumedintheU.S.,abouthalftheurbanpollutionandonefourththegreenhouse(温室)gases.The
HenryFord,thefamousU.S.inventorandcarmanufacturer,oncesaid,"ThebusinessofAmericaisbusiness."Bythishemeantt
Arecentstudy,publishedinlastweek’sJournaloftheAmericanMedicalAssociation,offersapictureofhowriskyitistoget
"Opinion"isawordthatisusedcarelesslytoday.Itisusedtorefertomattersoftaste,belief,andjudgment.Thiscasualus
"Opinion"isawordthatisusedcarelesslytoday.Itisusedtorefertomattersoftaste,belief,andjudgment.Thiscasualus
Inthe1920sdemandforAmericanfarmproductsfell,asEuropeancountriesbegantorecoverfromWorldWarIandinstitutedaust
Reebokexecutivesdonotliketoheartheirstylishathleticshoescalled"footwearforyuppies(雅皮士,少壮高薪职业人士)".Theycontendth
Imagineeatingeverythingdeliciousyouwant—withnoneofthefat.Thatwouldbegreat,wouldn’tit?New"fakefat"products
随机试题
某市工商行政部门的执法人员在身着统一制服的情况下对某饭店进行检查时,可以不出示其行政执法证件。
Inaworldasfast-changingandfullofinformationasourown,allofusneedtoknowhowtolearnwell.Yetevidencesuggests
患者,男性,77岁。不慎跌倒时以手掌撑地,造成Colles骨折。该患者在石膏绷带固定1小时后,出现手指疼痛、苍白、发凉,桡动脉搏动减弱。应警惕其发生了
有关时辰药理学的叙述不正确的是
具有降气平喘,消痰行水作用的药物是
承台下为4根直径为600mm钻孔灌注桩,桩长15m,承台平面尺寸及基桩分布如图所示,按《建筑桩基技术规范》(JCJ94—94)分析承台底土阻力群桩效应系数ηc
(2010年卷二第59题)根据知识产权海关保护条例及相关规定,下列说法哪些是正确的?
学校课程通常以选修课或__________的形式出现。
狭义的政府职能即()。
下列属于面向对象数据库产品有Ⅰ.GemstoneⅡ.ObjectivityⅢ.O2Ⅳ.Versant
最新回复
(
0
)