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
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Research
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Research
admin
2011-01-06
83
问题
Cancer develops over a long time, which means that you have years——typically decades——in which to hinder or promote it. Researchers are finding that what you eat may interfere with cancer growth at various stages. For example, certain foods can block the chemicals that initate cancer. Antioxidants(抗氧化剂), found in some vitamins and minerals, can snuff out oxygen free radicls (氧自由基), substances that are thought to make cells more susceptible to cancer, and they can even repair some of the cellular damage that has been done. And some food—wheat bran(麦,糠) in particular—has been shown to shrink precancerous(癌症前期的) cells.
A recent review of 17 studies from 17 nations reveals that people who eat the most fruits and vegetables have about half the cancer raters of those who eat the least. In fact, some research suggests that frequent consumption of fruits and vegetables can cut the risk of lung cancer even in smokers.
One of the most studied antioxidants in vegetables and fruits thought to protect against cancer is beta-carotene(β胡萝卜素), concentrated in deep green, yellow and orange vegetables such as carrots, sweet potatoes and spinach.
Research also shows that beta-carotene can change in the body to retinoic acid (维生素A酸), a substance used in clinical trials to treat certain cancers.
Here are some of the foods that contain cancer-fighting chemicals.
Tomatoes. One of the compounds in tomatoes that is thought to reduce the risk of cancer is lycopene(蕃茄素), the pigment (色素) that makes tomatoes red. Lycopene, an antioxidant that is also found in watermelons and apricots, quenches certain cancer-triggering oxygen free fadicals. Healthy people with the most blood lycopene.
Green Vegetables. A recent Italian study showed that dark-green leafy vegetables lower the risk of many cancer. Spinach, broccoli, kale and dark-green lettuces are chock-full of antioxidants, including beta-carotene, folate(叶酸) and lutein(叶黄素).A good rule of thumb(单凭经验的做法) : the darker the vegetable, the more antioxidants within.
Pungent preventives(刺激性的预防物). A whole host of chemicals thought to have cancer-inhibiting properties have been identified in allium vegetables, which include garlic, onions and scallions(大葱). Animal studies show that many of these chemicals block carcinogens that have been linked to colon, stomach, lung and liver cancer. A study at Pennsylvania State University found that feeding rats various garlic extracts and preparations(配制好的食物) reduced mammary tumors by as much as 71 percent. In humans, studies suggest that those who eat more onions and garlic are less prone to gastrointestinal cancer.
Research suggests that garlic compounds may even interfere with cancer progression. A recent German study found that ajoene, a garlic compound, is toxic to malignant cells. Garlic may also antagonize existing cancer by boosting(促进) immune functions, according to researchers at Loma Linda University School of Medicine. Their study, done on mice, found that garlic’s sulfur compounds increased the activity of macrophages and T-lymphocytes(淋巴细胞), two of the components of the immune system that destroy tumor ceils.
Although garlic compounds may reduce the risk of developing cancer, they have no effect on cancer that already exists.
选项
A、Right
B、Wrong
C、Not mentioned
答案
B
解析
见最后一段,“Research suggests that garlic compounds may even interfere with cancer progression…”研究提示,大蒜化合物甚至可能干扰癌的发展。最近的一项德国研究发现,一种大蒜化合物阿焦烯对恶性细胞有毒性。洛马·林达大学医学院的研究人员说,大蒜还可能通过提高免疫功能而对抗已出现的癌症。他们所做的老鼠实验发现,大蒜的硫化合物增强了免疫系统中两种消灭肿瘤细胞的成分——即巨噬细胞和T淋巴细胞——的活性。
转载请注明原文地址:https://kaotiyun.com/show/Izmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
1.Properarrangementofclassroomspaceisimportanttoencourageinteraction.Mostofushavenoticedhowimportantphysicals
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemforthemostofthemisunderstandings
MillionsofAmericanslackhealthinsuranceand,withtheeconomyfloundering,thatislikelytoincrease,theNationalAcademy
Playistheprincipalbusinessofchildhood,andinrecentyearsresearchhasshownthegreatimportanceofplayinthedevelopm
Ifyouareoneofthecurrentgroupoflong-termforeignresidentsinBeijing,youmightwanttoreflectontheprogressyou’ve
ChangesintheAmericanFamilyHowmuchchangehasreallyoccurredintheAmericanfamilyandwhataretheimplicationsofth
Reliefworkerswereshockedbywhattheysaw.
Womenworeuncomfortablebathingclothesbecause______.Thebathingmachinewasused______.
Reliefworkerswereshockedbywhattheysaw.
TheHammersmithHospital______.AnystoredimageattheHammersmithcanbesentto______.
随机试题
面色㿠白,多见于
为了保护劳动者的合法权益,调整(),建立和维护适应社会主义市场经济的劳动制度,促进经济发展和社会进步,这是《中华人民共和国劳动法》的立法目的。
施工组织总设计的内容包括:工程概况的特点分析、施工部署和主要工程项目施工方案、( )施工总平面图和技术经济指标等。
关于钢筋混凝土框架结构震害严重程度的说法,错误的是()。
根据城镇土地使用税法律制度的有关规定,下列各项中,应征收城镇土地使用税的有()。
调节旅游者情绪,消除其消极情绪的主要方法有()。
婴儿刚出生时,最发达的感觉是()。
下列各句中没有语病的一句是()。
北京农业大学的教授在河北省推广柿树剪枝技术时,为了说服当地的群众,教授把一块柿树园一分为二,除自然条件相同外,共他的条件包括施肥、灭虫、浇水、除草等也都相同,其中的一块柿树园剪枝,而另一块不剪枝。到收获季节,剪枝的一块柿树园的柿子产量比不剪枝的多三成以上。
若某大学分配给计算机系的IP地址块为202.113.16.128/26,分配给自动化系的IP地址块为202.113.16.192/26,那么这两个地址块经过聚合后的地址为()。
最新回复
(
0
)