字典翻译 问答 小学 英语 EVERYONEhasthosenights–youlieinyourbedforhourstossingandturningtotallyunabletofallasleep.Youwishyoucouldjustturnyourbrainoffasifitwerealight.Thatwouldmakethingsmucheasierwouldn’tit?Nowitlook
问题标题:
EVERYONEhasthosenights–youlieinyourbedforhourstossingandturningtotallyunabletofallasleep.Youwishyoucouldjustturnyourbrainoffasifitwerealight.Thatwouldmakethingsmucheasierwouldn’tit?Nowitlook
问题描述:

EVERYONEhasthosenights–youlieinyourbedforhourstossingandturningtotallyunabletofallasleep.Youwishyoucouldjustturnyourbrainoffasifitwerealight.Thatwouldmakethingsmucheasierwouldn’tit?

Nowitlookslikeyouareonestepclosertothiswilddreamofyours–scientistsfromOxfordUniversityUKhavejustdiscoveredthe“switch”thattellsthebraintogotosleepreportedForbes.

Tounderstandthestudyyoufirstneedtoknowthattherearetwomechanisms(机能)thatregulatesleep.There’sonethatwe’realreadyfamiliarwith–ourbodyclockwhichworksina24-hourcyclebasedonthelightchangesthroughouttheday.

Theotheroneiswhatscientistscallthesleep“homeostat(动态平衡系统)”.Thismechanismhasnothingtodowithdaylight.Insteaditkeepstrackofthebrain’swakinghoursandurgesittorestifithasbeenawakeforalongtime.“Itissimilartothethermostat(自动调温器)inyourhome.Athermostatmeasurestemperatureandswitchesontheheatingifit’stoocold”ProfessorGeroMiesenböckwholedthestudytoldTheTelegraph.

Ourbodiesusebothofthemechanismstoregulatesleep.“Thebodyclocksaysit’stherighttimeandthesleepthermostathasbuiltuppressureduringalongwakingday”explainedMiesenböck.

Thereisnowaythatscientistscantrickthebodyclock.Butwiththesleephomeostattheremightbesomethingtheycando.

Theresearchersfoundthatthesleephomeostatworksbyactivatingaspecificgroupofnervecellsorneuronsinthebrain.Theytestedtheirtheoryonfruitfliesbyremovingtheneuronsfromtheinsects’brains.Andasexpectedtheyfoundthattheflieswithoutthehomeostatneuronsdidnotkeeparegularsleeppatternanymore.

Nowthatscientistshavepinpointed(定位)theexactplaceinthebrain–orthe“switch”–thatregulatessleeptheycanbegininvestigating(研究)howtoactivatethesecellsatanygiventimesothatpeoplecanbesenttosleepinstantly.

Moreimportantlyfiguringouthowsleepmechanismsworkmayalsohelpustoonedayunraveloneoftheoldestmysteriesofall:whydoweneedtosleepinthefirstplace?

小题1:Whatisthearticlemainlyabout?A.Anewwaytotreatsleepdisorders.B.Thediscoveryofthesleep“homeostat

康仲生回答:
  小题1:B小题2:B小题3:C小题4:B分析:很多人有失眠的经历,那么大脑中有“睡眠开关”吗?科学家最近发现影响睡眠的除了生物钟,还有一种睡眠动态平衡系统,我们晚上睡觉的是两个技能的结合,科学家正在研究怎...
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