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
45
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、Tomaketheworldabetterplace.B、Towinthepresidency.C、Tobeaneducatedperson.D、Toupsetmorecelebratedrivals.A录音中
WhenMomandDadGrowOld[A]Theprospectoftalkingtoincreasinglyfragileparentsabouttheirfuturecanbe"oneofthemost
Forthispart,youareallowed30minutestowriteashortessaybasedonthepicturebelow.Youshouldstartyouressaywitha
A、Nothingbutthedarkness.B、Firefliesblinkingeverywhere.C、Aworldoflightinganimals.D、Wreckageofancientships.C录音开头演讲
A、Youngpeopletendedtodowhattheylike.B、Companiespreferredmaleworkerstofemale.C、Youngmengotbetterpaythanyoung
Theincreaseinglobaltrademeansthatinternationalcompaniescannotaffordtomakecostlyadvertisingmistakesiftheywantt
A、Africansarenotverybraveandresourceful.B、Thereisnotreatmentorhealthcarecenteratall.C、Therewerenoeffectivepr
A、Heisn’tsatisfiedwiththemoneycharged.B、Helikestothrowhisweightaround.C、Heiscriticaloftheothers.D、Helosesp
A、Theywilllivelonger.B、Theygetbetterpay.C、Theygetalongwellwithpeople.D、TheydevelophigherIQs.B讲座中提到,IFPRI已证实,精心
随机试题
有关尿亚硝酸盐试验,以下说法正确的是
女性,35岁,发现右侧颈部肿块5年余,自觉无任何不适,未曾就诊。近日来出现右颈部肿块疼痛,肿块较前增大。查体:右颈部扪及3cm×3cm肿块,质较硬,边界清楚,随吞咽上下活动,局部轻度压痛,无红肿。B超检查提示右甲状腺囊性占位性病变最佳治疗方案为
A、1天B、3天C、5天D、1周E、1个月非处方药限定疗程为平喘药成人服用
图4-44所示机构由杆O1A、O2B和三角板ABC组成。已知:杆O1A转动的角速度为ω,O1A=O2B=r,AC=h,O1O2=AB,则图示瞬时点C速度vC的大小和方向为()。
下列不属于谨慎性原则要求的是()。
保荐工作底稿应当真实、准确、完整地反映整个保荐工作的全过程,保存期不少于10年。()
建立现代企业制度是我国国有企业改革的方向。()
公安机关对已不具备人民警察条件,不适合在公安机关继续工作的人员,解除其与公安机关任用关系的一种人事行政管理措施,称为人民警察的()。
结合材料,回答问题材料1人固有一死,或重于泰山,或轻于鸿毛。守岛英雄王继才怎么也想不到,他的死会震动国人。在这个舆论纷扰、人心浮动的时代,王继才的去世为什么感天动地?一天的坚守或许不难,一年的坚守却弥足珍贵,王继才用32年的坚
在属性窗口中把窗体的KeyPreview属性设置为True,然后编写如下两个事件过程:PrivateSubForm_KeyDown(KeyCodeAsInteger,ShiftAsInteger)PrintChr(KeyCode)End
最新回复
(
0
)