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1、江苏省启东中学高中英语Unit1LaughterisgoodforyouWelcometotheunit教案牛津译林版选修6We'velongknownthattheabilitytolaughishelpfultothosecopingwithmajorillnessandthestressoflife'sproblems.Butresearchersarenowsayinglaughtercandoalotmore--itcanbasicallybringbalancetoallthecomponentsoftheimmunesystem,whichhelpsusfightoffdise
2、ases.(SeeHowtheImmuneSystemWorks.)Aswementionedearlier,laughterreduceslevelsofcertainstresshormones.Indoingthis,laughterprovidesasafetyvalvethatshutsofftheflowofstresshormonesandthefight-or-flightcompoundsthatswingintoactioninourbodieswhenweexperiencestress,angerorhostility.Thesestresshormonessuppr
3、esstheimmunesystem,increasethenumberofbloodplatelets(whichcancauseobstructionsinarteries)andraisebloodpressure.Whenwe'relaughing,naturalkillercellsthatdestroytumorsandvirusesincrease,asdoGamma-interferon(adisease-fightingprotein),T-cells,whichareamajorpartoftheimmuneresponse,andB-cells,whichmakedis
4、ease-destroyingantibodies.Laughtermayleadtohiccupingandcoughing,whichclearstherespiratorytractbydislodgingmucousplugs.LaughteralsoincreasestheconcentrationofsalivaryimmunoglobulinA,whichdefendsagainstinfectiousorganismsenteringthroughtherespiratorytract.Whatmaysurpriseyouevenmoreisthefactthatresear
5、chersestimatethatlaughing100timesisequalto10minutesontherowingmachineor15minutesonanexercisebike.Laughingcanbeatotalbodyworkout!Bloodpressureislowered,andthereisanincreaseinvascularbloodflowandinoxygenationoftheblood,whichfurtherassistshealing.Laughteralsogivesyourdiaphragmandabdominal,respiratory,
6、facial,legandbackmusclesaworkout.That'swhyyouoftenfeelexhaustedafteralongboutoflaughter--you'vejusthadanaerobicworkout!Thepsychologicalbenefitsofhumorarequiteamazing,accordingtodoctorsandnurseswhoaremembersoftheAmericanAssociationforTherapeuticHumor.Peopleoftenstorenegativeemotions,suchasanger,sadn
7、essandfear,ratherthanexpressingthem.Laughterprovidesawayfortheseemotionstobeharmlesslyreleased.Laughteriscathartic.That'swhysomepeoplewhoareupsetorstressedoutgotoafunnymovieoracomedyclub,sotheycanlaughthene
