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
34
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.
Green vegetables contain such antioxidants as beta-carotene, folate and lutein.
选项
A、Right
B、Wrong
C、Not mentioned
答案
A
解析
见第七段,最近意大利的一项研究显示,深绿色叶状蔬菜能降低多种癌症的发生率。菠菜、硬花球花椰菜、羽衣甘蓝和深绿色莴苣含有丰富的抗氧化剂,包括β胡萝卜、素、叶酸和叶黄素。
转载请注明原文地址:https://kaotiyun.com/show/Bzmd777K
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
Recently,amanwhowasalwaysingoodhealth,spentaweekinbedwithsevereflu.Itwastheworstillnessinhislife.Thepr
Therearevariouswaysinwhichindividualeconomicunitscaninteractwithoneanother.Threebasicwaysmaybedescribedasth
1.WhenChristopherColumbusLandonAmerica’sshores,heencounteredcopper-shinnedpeoplewhomhepromptlycalled"Indians".C
1.FilmisamediumthatmighthavebeenespeciallymadeforAmerica,avastcountrywhich,bythebeginningofthetwentiethce
Readthefollowingarticleandchoosethebestwordforeachspace.Forquestions26-45,markoneletterA,B,CorDonyou
Whatisthewritertryingtodointhetext?HowwillJohnandElizabethadvertisetheirtoweriftheysellit?
ManyWomenWhoBeatCancerDon’tChangeHabitsManywomenwhobattlebreastcancerwilltellyouit’salife-changingexperience
Reliefworkerswereshockedbywhattheysaw.
NewFoodsandtheNewWorldInthelast500years,nothingaboutpeople--nottheirclothes,ideas,orlanguages--haschangedas
A.stayuptilltheearlyhoursofthemorningB.sleepenoughtobringmostrefreshmentC.rebuildmemoriesstoredduringthed
随机试题
关于社会主义法治理念的内涵,下列说法正确的是()。
A.医疗机构药品调剂B.医疗机构药品采购C.医疗机构配制制剂D.医疗机构新药临床研究E.医疗机构药事管理本单位临床需要而市场上没有供应,并必须经省级药品监督管理部门批准的是
路某引诱了3位女子将她们容留在自己的住处卖淫,从中收取介绍费用和房租费。在闲暇之余路某分别嫖宿了这3位女子。已知3位女子均为未成年人,最大的16周岁,最小的才13周岁。则对路某行为的下列说法,正确的是:
争议一方为军队,且涉及土地面积较大的土地权属争议案件应由国土资源部来受理。()
招标文件的主要内容包括()。
某市政府酒店于1998年10月建成投入使用,占地面积为4865m2,建筑面积为9539m2,建筑为钢筋混凝土结构,共五层,1层为办公室,2~5层为客房、餐厅、包厢、厨房等。为能符合法律、设计、规范的要求,该酒店组织建立了消防安全管理体系。首先
2018年2月7日,我国第五个南极科考站——()在恩克斯堡岛正式选址奠基。
根据我国《宪法》的规定,()都由人民代表大会产生,对它负责,受它监督。
对于关系R,第二范式是要求R中的每一个非主属性满足
Baby-NamingTrendsA)Overthelastfiftyyears,Americanparentshaveradicallyincreasedthevarietyofnamestheygivetheirc
最新回复
(
0
)