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
2024-04-13
8
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/3553707.html
相关试题推荐
Somepeoplearguethatmoneyiseverything.Idon’tthinkso.Writeacompositio
[originaltext]Whydowecry?Canyouimaginelifewithouttears?Noton
[originaltext]Inthecaseofmobilephones,changeiseverything.Recentre
[originaltext]M:Hi,Mandy.How’severythinggoing?W:Nottoogood,Isuppose.M
Imaginethis:youwakeupeachmorningtofindyoursisterlyingbesideyou.
Imaginethis:youwakeupeachmorningtofindyoursisterlyingbesideyou.
Imaginethis:youwakeupeachmorningtofindyoursisterlyingbesideyou.
Imaginethis:youwakeupeachmorningtofindyoursisterlyingbesideyou.
Imaginethis:youwakeupeachmorningtofindyoursisterlyingbesideyou.
Imaginethis:youwakeupeachmorningtofindyoursisterlyingbesideyou.
随机试题
TurnontheTVorwebpage,andyoumayseeamousetryingtosellyousometh
我国目前见到的最早的能较完整记录语言,盛行于殷商时期的文字是()A.小篆 B.
药品经营企业依法变更许可事项,应重新办理《药品经营许可证》的情形是A.药品批发企
血小板保存期内,摇动速度为( )。A.10~20次/分钟 B.50~60次/
葡萄胎最常见的症状是A.子宫异常增大,变软 B.妊娠呕吐 C.停经后阴道流血
治疗米面薯芋等淀粉性食滞证,宜首选()。 A.鸡内金 B.山楂 C.麦芽
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
现代税收的财政原则包括()。A.充裕原则 B.配置原则 C.公平原则 D
(2021年第1批真题)项目部对劳务分包单位协调管理的重点是( ).。A.施工
如果几笔内容相同的经济业务,需要填列在一张记账凭证时,可采用“分数编号法”。()
最新回复
(
0
)