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
66
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、Ithasthemostaggressivepolicies.B、Ithasthehappieststudents.C、Itisaveryexpensiveprivateschool.D、Itislocated
Itseemslogical:Collegegraduateshavelowerunemploymentandearnmorethanlesseducatedworkers,so,thethinkinggoes,the
A、Theyareallergictomeat,fishandotheranimalproducts.B、Theycannotgetoverthebrutalscenesofkillinganimals.C、Some
A、Hecausedafireonaplanebysmoking.B、Hisflighthomewashijackedbyterrorists.C、Heexperiencedanaccidentat3,000ft
Theincreaseinglobaltrademeansthatinternationalcompaniescannotaffordtomakecostlyadvertisingmistakesiftheywantt
Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,butthisislar
A、Heisn’tsatisfiedwiththemoneycharged.B、Helikestothrowhisweightaround.C、Heiscriticaloftheothers.D、Helosesp
A、Goodsocialconnectionsmakepeoplelivelonger,healthierandhappier.B、Lonelinessisnotaffectedbythesurroundingsandl
A、Shehadsorepawsandlostweight.B、Shegottiredout.C、Shegotfatterthanbefore.D、Shehadasorethroat.A本题问的是当这只猫回来的时候
Drought,tsunami,violentcrime,financialmeltdown—theworldisfullofrisks.Thepoorareoftenmost【C1】______totheireffect
随机试题
女性,45岁。被鱼刺刺伤右手示指尖2天,右手示指尖针刺样痛半天就诊。查体体温36.8℃,右手示指轻度肿胀、压痛但压力不高,皮肤不红。下列处理措施,错误的是
脂质体可用于哪些药物的载体
纯羊毛纱线织造的机织物(170g/m2;幅宽180cm)()
A建筑工程公司(简称A公司)2012年3月份发生下列业务:(1)承包甲房地产开发公司(简称甲公司)的写字楼建设工程,工程总价款为5000万元,由于提前竣工,取得甲公司支付的相关奖励收入10万元。(2)承包乙公司的厂房建设工程,总承包额为2000万元,承
以下关于Word打印操作的说法,正确的有()。
阅读下列材料材料1改革开放以来,我国经济社会发展取得了历史性的伟大成就,胜利实现了现代化建设“三步走”战略的第一步、第二步目标,人民生活总体上达到小康水平。但是,现在达到的小康还是低水平的、不全面的、发展很不平衡的小康。党的十六大提出,要在
Ifyouwanttoloseweight,butarenotafanofthegym,theresultsofanewstudycouldofferawelcomealternative.Peoplew
运行下面程序时,从键盘输入字母A,则输出结果是()。#include<stdio.h>main(){charch;ch=getchar();switch(ch){case’A’:pr
【S1】【S9】
They’veliftedatwo-year-longeconomic______onthecountry.
最新回复
(
0
)