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
To sleep. Perchance (古英文,或许) to file? Findings published online this week by the Proceedings (文献汇编) of the National Academy of S
To sleep. Perchance (古英文,或许) to file? Findings published online this week by the Proceedings (文献汇编) of the National Academy of S
admin
2012-08-10
22
问题
To sleep. Perchance (古英文,或许) to file? Findings published online this week by the Proceedings (文献汇编) of the National Academy of Sciences further support the theory that the brain organizes and stores memories formed during the day while the rest of the body is catching zzz’s.
Gyorgy Buzsake of Rutgers University and his colleagues analyzed the brain waves of sleeping rats and mice. Specifically, they examined the electrical activity emanating (发源) from the somatosensory neocortex (大脑体觉新皮层) (an area that processes sensory information) and the hippocampus (海马状突起), which is a center for learning and memory. The scientists found that oscillations (震荡) in brain waves from the two regions appear to be intertwined. So-called sleep spindles (纺锤体) (bursts of activity from the neocortex) were followed tens of milliseconds (毫秒) later by beats in the hippocampus known as ripples (波动). The team posits that this interplay between the two brain regions is a key step in memory consolidation.
A second study, also published online this week by the Proceedings of the National Academy of Sciences, links age-associated memory decline to high glucose (葡萄糖) levels.
Previous research had shown that individuals with diabetes (糖尿病) suffer from increased memory problems. In the new work, Antonio Convit of New York University School of Medicine and his collaborators studied 30 people whose average age was 69 to investigate whether sugar levels, which tend to increase with age, affect memory in healthy people as well. The scientists administered recall tests, brain scans and glucose tolerance (血糖浓度容许量) tests, which measure how quickly sugar is absorbed from the blood by the body’s tissues. Subjects with the poorest memory recollection, the team discovered, also displayed the poorest glucose tolerance. In addition, their brain scans showed more hippocampus shrinkage than those of subjects better able to absorb blood sugar.
"Our study suggests that this impairment (损害) may contribute to the memory deficits that occur as people age. " Convit says. "And it raises the intriguing possibility that improving glucose tolerance could reverse some age-associated problems in cognition." Exercise and weight control can help keep glucose levels in check, so there may be one more reason to go to the gym.
In what way is memory related to hippocampus shrinkage?
选项
A、There is no relation between memory and hippocampus shrinkage.
B、The more hippocampus shrinks, the poorer one’s memory.
C、The more hippocampus shrinks, the better one’s memory.
D、The less hippocampus shrinks, the poorer one’s memory.
答案
B
解析
定位在第4段最后一句:In addition,their brain scans showed more hippocampusshrinkage than those of subjects better able to absorb blood sugar(此外,他们的脑部扫描也显示出海马状突起的缩小要比那些更容易从血液中吸收糖分的人明显),这一句中的“their brain scans”指上句中“Subjects with the poorest memory recollection(记忆力最差的人)”的大脑扫描,故正确答案是选项B。
转载请注明原文地址:https://kaotiyun.com/show/oU57777K
0
大学英语四级
相关试题推荐
A、Thewomanshouldcheckthebusschedule.B、ThebusesstoprunningonFridays.C、Thebusdoesn’tstopatthecorner.D、Thesche
AcademicFreedomreferstotherightofteachersandresearchers,particularlyincollegesanduniversities,toinvestigatethei
Veryfewpeoplecangetcollegedegreebefore11,butMichaelwasan【B1】______.Hestartedhighschoolwhenhewas5,finishing
Weallsufferfromstress.Therearemanypointswhentheremaybe【B1】______stress.Perhapswefeelitattimesof【B2】______,or
Childrenmodelthemselveslargelyontheirparents.Theydosomainlythroughidentification.Childrenidentify【C1】______aparen
Drunkendriving,sometimescalledAmerica’ssociallyacceptedformofmurder,hasbecomeanationalepidemic(流行病).Everyhourof
Workerscomeandgoastheyplease.Theymakevitaldecisionsprevious【M1】______madebythebosses.Secretarieshavebeen
Recently,thenewshasbeenfilledwithreportsofthe"birdflu."Asiaisonaregion-widehealthaleft,withgovernmentsslaug
WhilescientistsaresearchingthecauseoftheColumbiadisaster,NASAismovingaheadwithplanstodevelopanewcraftthatw
A、Hotclimate.B、Higherincome.C、Dietwithoutvegetables.D、Littleattentiontoexercise.D细节辨认题。对话中男士提到了导致美国人肥胖的几个原因,包括低收入、天气、
随机试题
#include<stdio.h>structdate{intyear=2010;intmonth=1;intday=1;}datel;main(){structdated
肺癌的首发症状通常为
A.仙方活命饮B.黄连解毒汤合五味消毒饮C.大黄牡丹汤D.复方大柴胡汤E.大黄牡丹汤合透脓散治疗肠痈热毒证的代表方剂是
下列哪些行为引发的争议属于行政诉讼的受案范围?()
一般圆管涵的纵坡不超过()。
下列关于防水工程不正确的是()。
按照现行规定,进口机械产品成套散件或零部件,每套价格总额已经达到同型号整机价格的60%及以上的,视同整机进口,海关按照整机进口的规定办理进口手续。()
税务机关作出的具体行政行为有下列()情形的,行政复议机关可以决定撤销、变更或者确认该具体行政行为违法。
关于银行业金融机构依法宣告破产,下列表述正确的是()。
StrengtheningIPprotection:fromlegislationtoenforcementLawsareinplacetoprotectintellectualproperty(IP)rightsint
最新回复
(
0
)