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
76
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.
Which season can strengthen the immune system in animals?
选项
A、Spring.
B、Autumn.
C、Winter.
D、Summer.
答案
B
解析
本文第一段说明动物在准备过冬时,也就是秋天,能够加强自身的免疫系统。
转载请注明原文地址:https://kaotiyun.com/show/uAkd777K
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
WriteacompositiononthetopicTraveling—AGoodWaytoLearn.Youshouldfollowtheoutline:(1)Travelingteachespeoplea
SupposeyouhavedonesomethingwrongtoyourfriendLiuMingformisunderstanding.Nowwritealettertoapologizetoher.You
Idon’tknowhowIbecameawriter,butIthinkitwasbecauseofacertainforceinmethathadtowriteandthatfinallyburst
Theevolutionofartificialintelligenceisnowproceedingsorapidlythat【C1】______theendofthecenturycheapcomputers【C2】
Sometimeago,Idiscoveredthatoneofthechairsinmyfronthallhadabrokenleg.Ididn’tforeseeanygreatdifficultyin
Sometimeago,Idiscoveredthatoneofthechairsinmyfronthallhadabrokenleg.Ididn’tforeseeanygreatdifficultyin
ForanincreasingnumberofstudentsatAmericanuniversities,Oldissuddenlyin.Thereasonisobvious:thegrayingofAmerica
随机试题
正则表达式中的符号一出现在口内和出现在口外的含义是不一样的。()
深圳证券交易所的证券交易方式有()。
(2005年)已知空气的密度ρ为1.205kg/m3,动力黏度(动力黏滞系数)μ为1.83×10-5Pa.s,那么它的运动黏度(运动黏滞系数)v为()。
效力待定合同包括( )订立的合同。
因果分析图是以( )为特征,以原因作为因素,将它们用箭头联系起来,表示因果关系的图形。
图示简支桁架,上弦杆AB主要承受( )。
高等教育私营化的最主要原因是()。
材料一:2006年12月26日,方便面中国分会在北京召开一届八次峰会,研究棕榈油和面粉涨价引起的企业成本增加问题。会议商定高价面(当时价格每包1.5元以上),中价面(当时价格每包1元以上)和低价面(当时价格每包1元以下)涨价的时间和实施步骤。从2007年7
只有坚持公有制的主体地位,才能()。①保证我国经济发展的社会主义方向②保证劳动人民在生活中的主人翁地位得到实现③防止两极分化,实现共同富裕④巩固和完善人民民主专政
WashingtonIrvingwasAmerica’sfirstmanofletterstobeknowninternationally.Hisworkswerereceivedenthusiasticallyboth
最新回复
(
0
)