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
考研
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
2016-03-06
75
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 (营养物) and can also cause unpleasant side effects in some people. So it’s up 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. (381 words)
We learn from the passage that olestra is a substance that______.
选项
A、contains plenty of nutrients
B、renders foods calorie-free while retaining their vitamins
C、makes foods easily digestible
D、makes foods fat-free while keeping; them delicious
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/Hpna777K
本试题收录于:
艺术硕士(艺术基础)题库专业硕士分类
0
艺术硕士(艺术基础)
专业硕士
相关试题推荐
简要分析说明发达国家跨国公司向新兴市场国家进行外国直接投资的动因与战略演变。
此部分的试题由问题分析和英译中两部分组成。请认真阅读下列所提供的英文背景资料,根据问题提示用英语进行分析解答(用中文解答为零分),然后请将文中划线部分的句子按编号顺序译成中文。WhatareSamsonite’SGlobalManufac
多国企业(MNE)与多国公司(MNCs)、跨国公司(TNCs)
跨国公司对东道国经济会产生哪些影响?
UNupgradesworldeconomicprospectsfor2010-2011,seesunevenglobalrecovery.AnewUnitedNations(UN)reportpublishedon
市场细分可以使跨国公司在满足具体目标群体的独特需求的同时,还可以获得()。
Imagineeatingeverythingdeliciousyouwant—withnoneofthefat.Thatwouldbegreat,wouldn’tit?New"fakefat"products
Thedeclineinmoralstandards—whichhaslongconcernedsocialanalysts—hasatlastcapturedtheattentionofaverageAmericans.
PeoplelivingonpartsofthesouthcoastofEnglandfaceaseriousproblem.In1993,theownersofalargehotelandofseveral
随机试题
在乳制品溶解度测定中,最后两次质量差不应超过2mg。
LearningFromMistakesLotsofpeopledarenotmakemistakes(mistake).Theyfeartheywillbelaughedator【C1】________(bl
A.后前位B.右前斜位C.左侧位D.右侧位E.左前斜位观察左心房的最佳体位是
患者,男性,36岁。近日头晕、乏力,活动后症状加重伴心慌、气促,在骨髓涂片中肉眼可看到脂肪滴,骨髓检测结果:骨髓增生减低;三系细胞均有不同程度的减少,慢性再障诊断成立。目前首选的治疗药物是
干燥综合征(SS)痛风
下列有关教师权利的说法错误的是()。
建立专门机关与广大群众相结合的社会工程,需要宣传组织群众,帮助群众掌握法律和政策,将()纳入法制轨道。
以下属于决策基本特征的有()。
车轮:汽车:运输
设矩阵A是n阶的,经过若干次初等变换得到矩阵B,则必有()。
最新回复
(
0
)