首页
登录
职称英语
Imagine eating everything delicious you want—with none of the fat that would
Imagine eating everything delicious you want—with none of the fat that would
游客
2024-04-04
10
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 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. [br] 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://tihaiku.com/zcyy/3540542.html
相关试题推荐
Imagineeatingeverythingdeliciousyouwant—withnoneofthefatthatwould
Imagineeatingeverythingdeliciousyouwant—withnoneofthefatthatwould
DietingadvisorDr.RobertAtkinsrecommendseatingadiethighinproteinf
DietingadvisorDr.RobertAtkinsrecommendseatingadiethighinproteinf
DietingadvisorDr.RobertAtkinsrecommendseatingadiethighinproteinf
DietingadvisorDr.RobertAtkinsrecommendseatingadiethighinproteinf
DietingadvisorDr.RobertAtkinsrecommendseatingadiethighinproteinf
DietingadvisorDr.RobertAtkinsrecommendseatingadiethighinproteinf
[originaltext]Teachershavealwayshadtodealwithcheatingstudents.[16]But
[originaltext]Teachershavealwayshadtodealwithcheatingstudents.[16]But
随机试题
AstheworldexcitedlygreetedSnuppy,thefirstcloned(克隆)dog,commentators
It’sTimetoPayAttentiontoSleep,theNewHealthFrontierA)Your
ManycongressmenwereinfavorofJefferson’smotionthataspecialcommittee___
Asheappliedsunscreentohisyoungdaughter’sface,DaraO’Rourke,prof
微分方程y'+x=0的通解为
以抵押担保方式申请个人经营贷款,银行除调查抵押物的合法性,抵押人对抵押物占有的合
女,25岁。在做下颌运动轨迹检查时发现:患者在闭口末期,从牙有接触开始到牙齿完全
下列哪种肿瘤的组织发生最可能来自导管上皮细胞A.基底细胞腺瘤 B.管状腺瘤
(2018年真题)下列各项中,引起企业会计等式中资产和负债同时增加的业务是( )
(2020年真题)在常用照明电源中,平均使用寿命最长的是()。A.白炽灯
最新回复
(
0
)