首页
登录
职称英语
Imagine eating everything delicious you want—with none of the fat. That woul
Imagine eating everything delicious you want—with none of the fat. That woul
游客
2024-06-10
4
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. 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 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 fatting 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 broke down. Manufacturers say it’s the ability to slide unchanged through the intestines that makes olestra so valuable as a fat substitute. It provides consumers with the taste of regular at 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 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
“Olestra is too large for the intestines to absorb.”“结构太大,以致肠不能吸收。”
转载请注明原文地址:https://tihaiku.com/zcyy/3628234.html
相关试题推荐
Imagineeatingeverythingdeliciousyouwant—withnoneofthefat.Thatwoul
Imagineeatingeverythingdeliciousyouwant—withnoneofthefat.Thatwoul
Hetalksasif__________________________.(对于这家企业他什么都懂)hekneweverythingabo
[originaltext]W:Why,Peter!Youaresweatingheavily.Wherehaveyoubeen?M:
[originaltext]W:Why,Peter!Youaresweatingheavily.Wherehaveyoubeen?M:
[originaltext]W:Why,Peter!Youaresweatingheavily.Wherehaveyoubeen?M:
Imaginethis:youaresittinginyourcarwhilewatchingamovie,youcanch
Imaginethis:youaresittinginyourcarwhilewatchingamovie,youcanch
Imaginethis:youaresittinginyourcarwhilewatchingamovie,youcanch
Imaginethis:youaresittinginyourcarwhilewatchingamovie,youcanch
随机试题
[originaltext]M:MayItakeamake-upexamnextweek?W:It’snotmypolicyto
Inrecentyears,publishers,directorsandTVproducershavetakenakeenin
[img]2012q1/ct_eilm_eillist_0339_20121[/img][br][originaltext]DAWN:We’vecha
Heresolutely______towhathehadsaidatthemeeting:hehadnotchangedhis
对某斜拉桥进行定期检查,并对桥梁进行技术状况评定。经检查后发现上部结构主梁为预应
海关一般要对旅客()入出境进行检査。A.携带物品 B.托运物品 C.旅行支
在水准测量中,若后视点读数大于前视点读数,则前后视点高度的关系是()。A.前后
.建设21世纪海上丝绸之路,是为了_______ 古代海上丝绸之路特有的价值和
已知钢筋混凝土过梁净跨ln=3.0m。过梁上砌体高度1.2m,墙厚190mm,墙
可以引起牙齿黄染的药物是()A.加替沙星 B.庆大霉素 C.甲砜霉素 D.
最新回复
(
0
)