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
84
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)
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
转载请注明原文地址:https://kaotiyun.com/show/Upna777K
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
在垂直分工为特征的国际分工体系中,跨国公司选择将生产制造环节外包的动因是什么?并请联系我国实际,分析这种现象对发展中国家经济的正面和负面影响。
以制造业为投资目标的跨国公司的对外直接投资在时间上对东道国市场有何影响,环境因素。
外国直接投资和国际借贷有什么区别?公司为什么要参与外国直接投资(进而成为跨国公司),而不仅仅是出口它们的产品?
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()。
ManyAmericansharboragrosslydistortedandexaggeratedviewofmostoftheriskssurroundingfood.FergusClydesdale,headof
Americansarepoundoftheirvarietyandindividuality,yettheyloveandrespectfewthingsmorethanauniform,whetheritis;
Sincewearesocialbeings,thequalityofourlivesdependsinlargemeasureonourinterpersonalrelationships.Onestrengtho
Americansarepoundoftheirvarietyandindividuality,yettheyloveandrespectfewthingsmorethanauniform,whetheritis;
Therearesomeearthphenomenayoucancounton,butthemagneticfield,somedayisnotofthem.Itfluctuatesinstrength,drif
随机试题
当使用JPEG作为优化图象的格式时:
某半导体存储器有8根数据线,13根地址线,则它的存储容量是()
弥漫性轴索损伤是在特殊外力机制(主要是旋转暴力)作用下,脑内不同质量组织之间发生剪应力,造成神经轴索断裂,甚至小血管撕裂出血等系列病理生理变化。
患者,男,32岁。残冠要求桩冠修复。检查:残冠,不松动,已行根管治疗,叩痛(一),关系正常,拟行烤瓷桩冠修复根管预备时,防止侧穿措施中哪项是不重要的
根据《关于进一步加强涉密测绘成果管理工作的通知》,下列关于涉密成果使用的说法中,正确的有()。
在下列有关内容中,一般可以作为施工合同索赔的依据是()。
幼儿思维发展的主要特点包括()。
服装业是劳动密集型产业,生产服装需要雇用一大批人。汽车业是资金密集型产业,大量资本投入到由相对少的人操纵的复杂设备上。如果不考虑附加收入的话,一个普通的美国服装工人在1979年的工资是一个普通的汽车工人的46%。下面哪一项,如果是正确的,可能是造成
就某一问题要求被调查者回答自己的想法或做法,以此来分析,推测群体的态度和心理特征的研究方法称为()【江西师范大学2011】
Isthereanythingmoreboringthanhearingaboutsomeoneelse’sdream?Andisthereanythingmoremiraculousthanhavingoneof
最新回复
(
0
)