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
公务员
Lonely people,it seems,are at greater risk than the gregarious of developing illnesses associated with chronic inflammation,such
Lonely people,it seems,are at greater risk than the gregarious of developing illnesses associated with chronic inflammation,such
admin
2020-03-28
29
问题
Lonely people,it seems,are at greater risk than the gregarious of developing illnesses associated with chronic inflammation,such as heart disease and certain cancers.A paper published last year in the Public Library of Science,Medicine,shows the effect on mortality of loneliness is comparable with that of smoking and drinking after examining the results of 148 previous studies and controlled for factors such as age and pre-existing illness.
Steven Cole of the University of California,Los Angeles,thinks he may know why this is so.He told the American Association for the Advancement of Science meeting in Washington,D.C.,about his work studying the expression of genes in lonely people.Dr.Cole harvested samples of white blood cells from both lonely and gregarious people.He then analysed the activity of their genes,as measured by the production of a substance called messenger RNA.This molecule carries instructions from the genes telling a cell which proteins to make.The level of messenger RNA from most genes was the same in both types of people.There were several dozen genes,however,that were less active in the lonely,and several dozen others that were more active.Moreover,both the less active and the more active gene types came from a small number of functional groups.
Broadly speaking,the genes less active in the lonely were those involved in staving off viral infections.Those that were more active were involved in protecting against bacteria.Dr.Cole suspects this could help explain not only why the lonely are iller,but how,in evolutionary terms,this odd state of affairs has come about.
The crucial bit of the puzzle is that viruses have to be caught from another infected individual and they are usually species-specific.Bacteria,in contrast,often just lurk in the environment,and may thrive on many hosts.The gregarious are therefore at greater risk than the lonely of catching viruses,and Dr.Cole thus suggests that past evolution has created a mechanism which causes white cells to respond appropriately.Conversely,the lonely are better off ramping up their protection against bacterial infection,which is a bigger relative risk to them.
What Dr.Cole seems to have revealed,then,is a mechanism by which social environment reaches inside a person’s body and tweaks its genome so that it responds appropriately.It is not that the lonely and the gregarious are genetically different from each other.Rather,their genes are regulated differently,according to how sociable an individual is.Dr.Cole thinks this regulation is part of a wider mechanism that tunes individuals to the circumstances they find themselves in.
What can we know about viruses and bacteria from the fourth paragraph?
选项
A、Viruses often remain hidden in the environment.
B、Bacteria are passed to other people by the infected individual.
C、The lonely people can catch viruses more easily.
D、Viruses pose a greater threat to the gregarious than bacteria.
答案
D
解析
细节题。根据题干信息定位到第四段。根据本段前三句可知,病毒只有通过另一个已被感染此病毒的人才能传染给某个人,并且病毒通常有一对一的特殊宿主。相比之下,细菌经常潜伏在周围环境中,并且宿主众多。所以爱交际的人比孤独的人更易感染病毒。由此可见,病毒较之细菌对爱交际的人的威胁更大,故D项为正确答案。原文提到经常潜伏在周围环境中的是细菌,而不是病毒,故A项错误。B项描述的是病毒的传染方式。C项与原文中的The gregarious are therefore at greater risk than the lonely of catching viruses描述矛盾。故本题选D。
转载请注明原文地址:https://jikaoti.com/ti/usdpFFFM
本试题收录于:
银保监法律类题库国家公务员分类
0
银保监法律类
国家公务员
相关试题推荐
想进一步知道美国为什么拒绝中国高铁,还需要知道,到目前为止,美国的高铁为什么发展不起来。关于这个问题,以往的分析主要集中在美国的人口数量和城市密度、地理环境以及资金来源等方面,这些当然是原因,但却不是主要的,尤其是随着美国社会的发展,它们的影响越来越弱。根
在喧嚣浮躁、急功近利占领“主打市场”的时代氛围里,“板凳要坐十年冷,文章不写半句空”的专注精神不说是“异数”,也绝对称得上是________资源。何种价值观________时代风气。社会必然结出相应的“价值果”。填入画横线部分最恰当的一项是:(
大数据概念的提出早已不是新鲜事,近年来用大数据思维将产业形势指数化的尝试屡见不鲜,但对于电影文化领域而言,步伐却似乎显得缓慢,且更多局限在微观研究领域。许多电影人总觉得电影的本质在于艺术性,需要进行主观评价而非量化评估,因此很少用标准化、数据化的方式去综合
①也是个人分析、处理、理解信息能力较差的一种表现②在一个“知识”和“干货”漫天飞舞、扑面而来的时代,如何认识信息,已经不只是拯救焦虑的前提③所谓知识焦虑,说到底是一种信息焦虑④也就是说,如果一个人长期饱受知识焦虑的困扰,焦虑很可能会演变成为心理疾病
2016年,我国邮政行业业务总量完成7397.2亿元,同比增长45.7%。全年邮政行业业务收入(不包括邮政储蓄银行直接营业收入)完成5379.2亿元,同比增长33.2%。快递业务实现快速增长,全年快递服务企业业务量完成312.8亿件,同比增长51
2016年,我国邮政行业业务总量完成7397.2亿元,同比增长45.7%。全年邮政行业业务收入(不包括邮政储蓄银行直接营业收入)完成5379.2亿元,同比增长33.2%。快递业务实现快速增长,全年快递服务企业业务量完成312.8亿件,同比增长51
无条件反射亦称非条件反射,是外界刺激与有机体反应之间与生俱来的固定神经联系,或在出生后发挥作用,或随着有机体的生长发育而出现。只要反射弧完整,在相应的刺激下,不需要后天的训练就能引起反射性反应。根据上述定义。下列选项中属于无条件反射的是:
截至2019年3月31日,证券业协会对证券公司2019年第一季度经营数据进行了统计。131家证券公司当期实现营业收入1018.94亿元,同比增长54.47%。其中,各主营业务收入分别为代理买卖证券业务净收入(含席位租赁)221.49亿元,同比增长
2020年底颁布的《政府督查工作条例》是我国政府督查领域的第一部行政法规,是政府督查工作长期实践的系统总结。下列有关说法正确的是:
任何民俗事项都不可能________其赖以生存的文化环境:一方面,文化传统需要________于各种民俗事项作为其存在和传播的载体;另一方面,各种民俗事项必须具有一定的文化内涵才具有真正的价值和意义。填入画横线部分最恰当的一项是:
随机试题
汽车线路接线的一般规律如何?
A.简化口腔卫生指数(OHI—S)B.龈指数(GI)C.龈沟出血指数(SBI)D.探诊出血(BOP)E.牙周指数(PI)适用于流行病学调查和临床疗效评价牙龈炎症程度,但对炎症较重的人群有缺陷的是
乳岩好发年龄为:
阅读下文,回答问题。爸爸的咳嗽自从我家搬进新居以后,不知怎的,爸爸得了一种奇怪的咳嗽病——有时咳得厉害,有时咳得轻些,有时却又像没病似的。后来我发现
朝晖夕阴,_________。(范仲淹《岳阳楼记》)
阅读下面这首诗,写一篇500字左右的鉴赏评论文章。临安春雨初霁[南宋]陆游世味年来薄似纱,谁令骑马客京华?小楼一夜听春雨,深巷明朝卖杏花。矮纸斜行闲作草,晴窗细乳戏分茶。素衣莫起风尘叹,犹及清明可到家。
材料一77岁的彝族老阿妈克迟莫,乘坐5619次列车从下普雄前往上普雄走访亲戚。阿妈很爱笑,也很健谈,因为牙齿几乎掉光,她笑着的时候总是害羞地抿着双唇。她说:“1968年,25岁从上普雄嫁到了下普雄,走了一天多的山路,才到夫家。两年后的1970年,
下列关于无线局域网IEEE802.11标准的描述中,错误的是______。
下列关于二叉树的叙述中,正确的是()。
Fortypeoplewerekilledina______ontherailwayyesterday.
最新回复
(
0
)