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
2018-05-11
36
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/vaT7777K
0
大学英语六级
相关试题推荐
A、Hefeelshappyalltheday.B、Heismorewillingtogetup.C、Heexpectsraintocomesoon.D、Helikescloudydaysbetter.B女士
Childrenwholivenearamainroadareingreaterdangerofcatchingpneumonia(肺炎)becausepollutionfrompassingtrafficdamages
A、Herparents’hardworktofulfilltheirfullpotential.B、Herparents’thirstforopportunitiesofhighereducation.C、Herpar
A、Heshouldnolongerputoffanythinginlife.B、Heshouldcelebratehissurvivalwithhisfriends.C、Heshouldeliminatenegat
Thepooroldconsumer!We’dhavetopayagreatdealmoreifadvertisingdidn’tcreatemassmarketsforproducts.Itisprecisel
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand1
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand1
A、TravelinginSouthAfricatoseekmedicalhelp.B、PromotingawarenessandpreventionofAIDS.C、Visitingclientsandsigningc
Forthispart,youareallowed30minutestowriteashortessaybasedonthepicturebelow.Youshouldfocusontheimpactofs
A、Motherisimportantforchildrenaswellasteachers.B、Stayingwithmotherisbetterthanattendingadaycarecenter.C、Ther
随机试题
耳前鬓发后缘直上,平角孙处乳突前下方,平耳垂后下缘的凹陷中
白果不具有的功效是
根据我国《建筑法》规定,下列关于总分包责任承担的叙述有误的是( )。
在以现金、非现金资产和修改债务条件混合重组方式清偿债务的情况下,以下会计处理先后顺序正确的是( )。
对于10BASE—T网络,以下说法正确的有()。
下列犯罪中,应按数罪并罚原则处理的有()(2011年法学基础课多选第25题)
存在且不为零的充要条件是常数p=______,此时该极限值为______.
设f(x)连续,且=e3,且f’(0)存在,求f’(0).
在Open语句中可以用Output和Append两种方式打开顺序文件,其主要区别是
Oneofthegoodthingsformeninwomen’sliberationisthatmennolongerhavetopaywomentheold-fashionedcourtesies.
最新回复
(
0
)