首页
登录
职称英语
Imagine eating everything delicious you want with none of the fat. That woul
Imagine eating everything delicious you want with none of the fat. That woul
游客
2025-03-24
18
管理
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 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 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 fit 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. [br] 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 impair the digestive system.
C、It may spoil the consumers’ appetite.
D、It may affect the overall fat intake.
答案
A
解析
细节题。根据文章第六段介绍,一些对olestra持批判态度的人认为,它会妨碍维生素A、D、E、K以及类胡萝卜素的吸收,而类胡萝卜素正是减少癌症以及心脏病发病率的一种化合物,因此A为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/4011448.html
相关试题推荐
A:Hi,Tom.Howiseverything?B:______A、Idon’tcareatall.B、Nogood,thanks
Imagineeatingeverythingdeliciousyouwantwithnoneofthefat.Thatwoul
Imagineeatingeverythingdeliciousyouwantwithnoneofthefat.Thatwoul
Imagineeatingeverythingdeliciousyouwantwithnoneofthefat.Thatwoul
A:Dideverythingcomeoutasexactlyasyouplanned?B:______A、Exactly.Andth
SpeakerA:Thankyouforeverythingyou’vedoneformeduringmystayhere.Spea
Imagineeatingeverythingdeliciousyouwantwithnoneofthefat.Thatwoul
Imagineeatingeverythingdeliciousyouwantwithnoneofthefat.Thatwoul
Itisdifficulttoimaginewhatlifewouldbelikewithoutmemory.Themeani
Itisdifficulttoimaginewhatlifewouldbelikewithoutmemory.Themeani
随机试题
Hespokeslowlysothateveryone______whathehadsaid.A、oughttounderstandB
Whatanimalsswimfrombirth?Allmammalsexceptmanand______.[br]Howmany
[img]2012q2/ct_etoefm_etoeflistz_0870_20124[/img][br]Accordingtotheprofesso
[originaltext]W:Whereisyourfather,Mary?M:Hewaswateringthetreesandf
计算简答题:根据所给材料回答问题。(需计算后回答的问题须列出算式,小数保留2位。
硫喷妥钠的临床适应证较广,但一般很少用于A.麻醉诱导 B.麻醉维持 C.短小
下列关于上市公司可转换公司债发行条件的有关说法,正确的有( ) Ⅰ公开发行可
学生在教师指导下为解决某个问题而进行探讨、辩明是非真伪以获取知识的方法是()。
根据《招标投标法》,关于开标活动的做法,错误的是( )。A.开标应当在招标文件
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
最新回复
(
0
)