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
2010-02-26
44
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. 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)"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 fatting 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 broke down. Manufacturers say it’s the ability to slide unchanged through the intestines that makes olestra so valuable as a fat substitute. It provides consumers with the taste of regular at 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 passes through the intestines without being absorbed
B、it facilitates the absorption of vitamins by the body
C、it helps reduce the incidence of heart disease
D、it prevents excessive intake of vitamins
答案
A
解析
“Olestra is too large for the intestines to absorb.”“结构太大,以致肠不能吸收。”
转载请注明原文地址:https://kaotiyun.com/show/JbOK777K
0
大学英语六级
相关试题推荐
A、ToputthehomeworkonDavid’sdesk.B、ToleavethemasterkeyforDavid.C、TogiveDavid’sstudentsthenextassignment.D、To
A、Becausesheisontheexecutivestaff.B、Becausesheisfamiliarwiththecompany.C、Becauseshehasknowledgeofmanagement.
A、Theweatherwasalittlebitcold.B、Theweatherwasalittlebitwarm.C、Theweatherwasfavorable.D、Theweatherwasdisappo
Terrifiedbythecruelty,manypeople______(强烈反对用动物做实验).
A、Hehaslosthishistorybook.B、Hedoesn’tlikethehistorycourse.C、Hehastoreadalotofhistorybooks.D、Hefindshistor
Itisfundamentalthat____________(两国调和彼此间的分歧),ortheyhavetostoptheirnegotiations.
Theauthorismostprobablya______.Thephrase"breaktheimpasse"(Para.5)isclosesttothemeaningof"______".
______(发现很难适应那里的气候),hedecidedtomovebacktothenorth.
A、Becausethey’requiteimpressivewithastrongeffect.B、Becausetheyarenotsofrustratingasotherexpressions.C、Becauset
A、Hehasdecidedhowhe’sgoingtospendtheprizemoney.B、Hedoesn’tknowhowmuchhisrentisgoingtoincrease.C、He’salrea
随机试题
请编写函数fun,其功能是:将放在字符串数组中的M个字符串(每串的长度不超过N),按顺序合并组成一个新的字符串。例如,若字符申数组中的M个字符串为{“AAAA”,“BBBBBBB”,“CC”},则合并后的字符串内容应该是“AAAABBBBBBBC
某地区有50家生产皮鞋的企业,要研究他们的产品生产情况,总体是()。
集中型风险管理部门的人员必须具备的主要技能包括()。
下列各项中,会引起留存收益总额发生增减变动的是()。
生产函数表示的是生产中()和()之间的依存关系,这种关系普遍存在于各种生产过程之中。
人们常用盐度来表示海水中溶解的盐类物质的多少,下列关于盐度的说法错误的是()。
中国共产党领导的武装斗争,实质上是在无产阶级领导下的农民战争,这是因为
下列叙述正确的是
•Readthearticlebelowaboutinternationaltaxation.•Inmostofthelines41--52thereisoneextraword.Itiseithergramm
Whenwehavetotalkaboutsomethingthatmaybegoingwrong,wherethere’ssometroublebrewing(酝酿着),orsomethingthatmight【
最新回复
(
0
)