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
外语
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
2016-04-30
35
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.
Olestra is different from ordinary fats in that _____.
选项
A、it facilitates the absorption of vitamins by the body
B、it passes through the intestines without being absorbed
C、it helps reduce the incidence of heart disease
D、it prevents excessive intake of vitamins
答案
B
解析
第6段首句提到“Olestra因体积太大,含有6—8个脂肪酸分子,而不能被肠胃分解吸收”,因此B正确。A、D与文中所表达的意思相悖;只有类胡萝卜素才有此功能,因此C不对。
转载请注明原文地址:https://kaotiyun.com/show/RCG7777K
0
大学英语六级
相关试题推荐
Thereasonfruitsandvegetablesaresoimportanttoyouroverallhealthisthattheyaremajorpurveyorsofantioxidants.A
WhenIwasachild,myteethusedto【B1】______inseveraldifferentdirections,and【B2】______thatinvolvedratherexpensive【B3】__
Ithinkthat,fromabiologicalstandpoint,humanlifealmostreadslikeapoem.Ithasitsownrhythmandbeat,itsinternalcy
A、Shedoesn’tknowwhattoread.B、Shehastodosomeresearchonbiologyoreconomics.C、Shehastofinishtwopapersthatare
Peopletendtounderestimatetheirlifeexpectancy,andit’snotsurprising.It’sthelook-aroundproblemagain:You【C1】______fr
TheAmericaneconomicsystemisorganizedaroundabasicallyprivateenterprise.It’s【B1】______economyinwhichconsumersdeterm
Inthemarket’seyes,thelatestroundofconsumer-spendingnewswasgood.Itwassogoodthatthestockshadanotherbubblingd
U.S.collegestudentsareincreasinglyburdenedwithcreditcarddebt,accordingtoastudyreleasedTuesday,andtheconsequenc
Nowadays,itseemsthatpeoplearespendingmoreandmoretimewatchingmovies.Therefore,theinfluenceofmoviescannotbeign
Negotiationsworkwonders.Thisisparticularlysoininternationalbusinesssinceitismostlythroughnegotiationsthatexport
随机试题
特别行政区行政长官的职权主要__________、_________、__________、___________、___________。
在党的路线、方针、政策的教育方面,必须使广大人民群众认识哪些问题?
整个GPS系统的核心是()
对尿道狭窄描述错误的是()
A.千金止带丸B.白带丸C.花红颗粒D.妇炎平胶囊E.妇科十味片外用,治疗湿热下注之带下病的是()。
的士宁加浓硫酸1ml,加少于重铬酸钾晶体,颜色的变化顺序为()
甲公司采用公允价值模式计量投资性房地产。有关资料如下:(1)2010年12月1日甲公司与A公司签订协议,将自用的办公楼出租给A公司,租期为3年,每年租金为1000万元,于每年年末收取,2011年1月1日为租赁期开始日,2013年12月31日到期。20
甲商贸有限责任公司的公司章程中规定,公司设监事会,由5名监事组成,且应当有半数以上监事为职工代表。该公司章程的规定符合公司法律制度的规定。()
字长是CPU的主要性能指标之一,它表示()。
Thoughtheglassbuildingismodernenough,suchscenessuggestthatlittlehasreallychangedatLondon’sancientinsurancema
最新回复
(
0
)