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
Some animals apparently can resist cancer by strengthening their immune system in preparation for winter, Johns Hopkins research
Some animals apparently can resist cancer by strengthening their immune system in preparation for winter, Johns Hopkins research
admin
2011-03-01
58
问题
Some animals apparently can resist cancer by strengthening their immune system in preparation for winter, Johns Hopkins researchers said on Wednesday.
The scientists said their study is the first to show that the central nervous system, reacting to environmental changes, may spark changes in the body’s immune system that control the growth of tumors.
They said if that is the ease, a better understanding of how the process works eventually could lead to new cancer treatments.
Dr. Randy Nelson, an associate professor of psychology at Hopkins, stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day, the animals’ immune system and cancer. More work also would be needed to show that the findings could be applied to human cancer.
Dr. Faye Austin, an immunologist with the National Cancer Institute in Bethesda, said: "It’s a very intriguing observation that the length of exposure to light can affect the growth of a tumour. But I think that the draws really need further work to clarify the mechanics."
But Austin said the findings were surprising and important, only because they open up a new approach for research.
Studies showed that stress weakened the immune system in animals. They figured that because winter is stressful, the season probably causes exertion (影响) on the immune system.
The researchers reasoned that animals that compensated by boosting (促进) their immune systems as winter approached would have a better chance of surviving and producing offspring.
"In the same way that animals have evolved to select the best time to breed, it struck me that animals ought to be able to predict when conditions would be challenging immunologically." Nelson said.
Animals can strengthen their immune system in preparation for winter because ______.
选项
A、when season changes, the central nervous system reacts to environment and that sparks changes in the body’s immune system
B、animals have shorter exposure to light in winter than in summer
C、animals have evolved to select the best time to breed and be able to predict the change of conditions
D、all of the above
答案
A
解析
见文中一、二段,可显然得出答案。
转载请注明原文地址:https://kaotiyun.com/show/5Akd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Ithasalwaysbeenaproblemtodecidewhether"popularmusic"ismusicwhichrepresentsthepeopleorissimplymusicthatthe
Ithasalwaysbeenaproblemtodecidewhether"popularmusic"ismusicwhichrepresentsthepeopleorissimplymusicthatthe
Playistheprincipalbusinessofchildhood,andmoreandmoreinrecentyearsresearchhasshownthegreatimportanceofplayi
Playistheprincipalbusinessofchildhood,andmoreandmoreinrecentyearsresearchhasshownthegreatimportanceofplayi
Bythetimewehadcompletedourpreparations,theskywasbeginningtogrowrapidlylighter,althoughthesunwasnotyetabo
Youshouldspendnomorethan20minutesonthistask.Youandyourfamilyhaddinnerinarestaurantafewnightsago.The
Ifyouwanttostayyoung,sitdownandhaveagoodthink.ThisistheresearchfindingofateamofJapanesedoctors,whosayt
AspeciallabattheUniversityofChicagoisbusyonly【C1】______.Itisadream【C2】______whereresearchersareatwork【C3】___
Thelongyearsoffoodshortageinthiscountryhassuddenlygivenwaytoapparentabundance.Storesandshopsarechokedwithf
Thelongyearsoffoodshortageinthis’countryhavesuddenlygivenwaytoanapparentabundance.Storesandshopsarechokedw
随机试题
根据《城乡医疗救助基金管理办法》,关于城乡医疗救助基金使用的说法,正确的是()。
十六进制数(AB)16变换为等值的十进制数是____________。
经筋的生理功能是
下述情形中,属于三级医疗事故的是造成患者
下列费用中,属于建设单位经费的是()。
反映项目管理班子内部项目经理、各工作部门和各工作岗位对各项工作任务的管理职能分工,所采用的组织工具是()。
电学工程师已反复重申,最好的晶体管扩音机与最好的电子管扩音机在通常测量评价扩音机的音乐再现质量方面的性能是一样的。因此那些坚持认为录制的音乐在最好的电子管扩音机里播放时要比在最好的晶体管扩音机里播放时听起来好的音乐爱好者,一定是在想象他们声称的听到的质量上
现代教育技术学研究的重要内容是【】
二战后期,面对国际货币关系领域的自由放任与国际经济的发展要求,《经济学家》杂志指出:“迫切需要货币方面的国际协议。”此后建立了()。
不属于20世纪50年代以前的苏联主要的马克思主义教育家及论著的是()
最新回复
(
0
)