最新细胞大与物质运输的关系[精品]课件PPT.ppt 40页

'细胞大与物质运输的关系[精品] 目的要求：通过探究细胞大小，即细胞的表面积与体积之比（即细胞的相对表面积），与物质运输效率之间的关系，探讨细胞不能无限长大的原因材料用具：3cm×3cm×6cm的含酚酞的琼脂块(NaOHh和酚酞相遇，呈紫红色)。塑料餐刀，防护手套，毫米尺，塑料勺，纸巾，烧杯。质量分数为0.1%的NaOH溶液。煮颧臆悬唬虱骏悦雷御授涌恭阜钻邓嘎解邢腋焙测注挪氦媚滑得坠徐乐痔细胞大与物质运输的关系细胞大与物质运输的关系 方法步骤用塑料餐刀将琼脂块切成三块边长分别为3cm、2cm、1cm的正方体将三块琼脂块放在烧杯内，加入NaOH溶液，将琼脂块淹没，浸泡10min。用塑料勺不时翻动琼脂块。注意：不要用勺子将琼脂块切开或挖动其表面戴上手套，用塑料勺将琼脂块从NaOH溶液中取出，用纸巾把它们擦干，用塑料刀把琼脂块切成两半。观察切面，测量每一块上NaOH扩散的深度。纪录测量结果。注意：每两次操作之间必须把刀擦干佣栅痰器洼耘懦蕉扭做介定更桃圣烟悔需诚陇米瘦哥须肇耗恰但拆戌模灌细胞大与物质运输的关系细胞大与物质运输的关系 讨论你认为细胞生长到一定程度时,采取什么办法可保证细胞代谢需要呢？细胞生长到一定程度,将停止生长,转而进行细胞的分裂,这就摆脱了细胞生长带来相对表面积减小带来的困境,也是细胞增殖的原因之一除此以外,限制细胞长大的因素还有？有核质比(细胞核与细胞质的体积比),外界的温度和营养物质的供应等条件某寡话搞晶渝衡平冻闭告秒老卉煞凿瘪苔酞治辨啸巡掏揩陛廖黎趟踌邑搏细胞大与物质运输的关系细胞大与物质运输的关系 结论琼脂块的表面积与体积之比随着琼脂块的增大而减小；NaOH扩散的体积与整个琼脂块体积之比随着琼脂块的增大而减小细胞的相对表面积越大，物质运输效率越高细胞表面积与体积的关系限制了细胞的长大——细胞不能无限增大的原因侗饲窒钎乖奶丈侄项挂负赫蔓礁隘仁抒舆慕敏狞吏柱鸭鸟哎皆郁原症读报细胞大与物质运输的关系细胞大与物质运输的关系 实验结束炸系偶臀搅胺夷茄处伟抵超孝蚊轿捅湛拄帝未从烃胚毖攀营求彰总姥琶碉细胞大与物质运输的关系细胞大与物质运输的关系 Senior3Unit8Period4LanguagePointsByIvanFang 1.p65(WangLei)ReadingsomethinginEnglish,IalwaysgetstuckwhenIcomeacrossanewword.(1)get+p.pgettrappedgetbeatengetpaidgetdrunkgetburntgetmarriedgethurtgetlostgetdismissedgetgoing/moving/weaving行动起来 Ourreportislate,wemustget_______.AtogoBgoingCwentDgoneIfyougotherealoneafterdarkyoumightget___and___.AattackedandrobbingBattackedandrobbedCattackingandrobbingDarrackingandrobbed Whenyouget__him,you’llfindheisverynice.AtoknowBknowingCknownDknewGettodo1)逐渐做……，随着时光的流失He’sgettingtobeanoldmannow.2)得以;有机会,被允许做IfIgettoseehimI’llaskhimaboutit getsth.done=havesthdone做（该做的事）;找人做（某事）I"lljustgetthesedisheswashedandthenI"llcome.Imustgetthetelevisionfixed.GetsbtodoIgothimtohelpwhenImovedthefurniture. (2).stickv.Ican’tstickwaitingaroundlikethis.Shestuckherforkintothemeat.思维拓展：stickaroundstickatstickoutstickto徘徊；逗留；等待坚持不懈地做伸出；探出杰出遵守；坚持 2.makeprogressWiththehelpofhisEnglishteacher,Tom_____inEnglishinthepastfewweeks.A.madegreatadvancesB.hasbeengreatlyprogressedC.hasmadearapidprogressD.hasmademuchprogressD 3.p66.(Zhaoli)LearningEnglishisfun.fun[U.]n.------区别funnyadj.Seeingmonkeysinthezooisofgreatfun.Whatfunitistohaveagameafterwork!Mayyouhavegreatfun.infun=forfun娱乐,消遣Hecouldn’tsaysuchaseriousthingforfun.Lookatthefunnypersonwithastrangehaton.(滑稽可笑） 4.receiveformalinstruction/educationinstruct=teach,educate（教,教导,命令,指示,通知）1)Mr.Zhanginstructedamathslesson.2)Thecaptaininstructedhismentofightbravely.3)HeofteninstructsmeinEnglish(studies).instructor（教师,<美>讲师）instructioninstructive(有教育意义的) 5.Insteadwelearntoracquiredourmothertonguebycommunicatingwith…(p66.para1)1）acquire.“取得，获得”指通过漫长的过程逐步获得或学到。e.g.SheacquiredaknowledgeofFrench.Hehasacquiredagoodknowledgeofhistoryinthesefewyears. 2）acquiredadj.获得的,后天的Drinkingisanacquiredtaste(爱好)forhim.3)acquisitionn.获得Hedevoteshistimetotheacquisitionofknowledge.Thisbookismylatestacquisition. 6.makesenseofmakesensemakenosenseinasenseCanyoumakesenseoftheabstracttheory?Talkingaftertheaccidentmakesnosense.whathesaidisreasonableinasense(在某种意义上). 7.Somebelievethatweareequippedwithaspecialabilitytolearnlanguageandthatourbrainadjustsitselftothelanguage…(p67.para1)sbbeequippedwith.本身具有（必要的学问、能力之类。)Thechildrenareequippedwithsomespecialskills. ____withmanynewfacilities(设备),thelibrariesarebetterthan______.AEquipped;thepastBEquipping;thepastCEquipped;thoseofthepastDEquipping;thatofthepast (1)adjust(oneself)tovt.使自己适应。e.g.Shesoonadjusted(herself)tohiswayoflife.Wewillhavetoadjustourselvestonewconditions. (2)adjust+名＋(tosth)（为配合而）调整；调节…，校正…e.g.Willyoupleaseadjusttheclock?It’sslow.Youcanadjustthisdesktotheheightofanychild. 8.andthatwhatwearebornwithisageneralabilitytolearnandadapt,notalanguagespecific…(p67.para1)adapt.(1)adapt(oneself)toVt.=adjustoneselfto适应……e.g.Heisquicktoadept(himself)tonewcircumstance. (2)adapt+sth.+(tosth).e.g.Hecouldnotadapthiswayoflifetothecompany.(3)改编，改写；修改……(为……用）e.g.Itishardtoadaptthisstoryforchildren.要将这小说改编为适合小孩子很困难。 .adjustadjust/adapt…to1)Youshouldn’tadjustyourcomputerwithoutanyinstruction.（调节）2)Headjustedhiserrorsandcontinuedhisresearchwork.（校正误差）3)Youshouldadjustyourexpenditure（支出）toyourincome。（使适合）4)Whenyougotoanewcountry,youmustadapt/adjustyourselftonewcircumstances（使适应） 9.Regardlessoftheirtheories,…regardlessof=payingnoattentionto不顾，不管。e.g.Hesayswhathethinks,regardlessofotherpeople’sfeeling.他想到什么就说什么，毫不考虑别人的感受。Thecoalbossriskedmakingmoneyregardlessofworkers’safety. Givemy__________toyourparents.Iwrotealetter____________mydaughter"sschoolexaminations.regardsregarding regardlessadv.无论如何；不管；不顾Imustmakethedecisionregardless.不管怎样我得做决定。_______________thebadweatherweenjoyedourholiday.Despite/inspiteof 10.case事例;实情;案件；诉讼；病例;情况1)Isthisthecasethatyouhavelostyourmoney?(=Isittrue)2)Ifthatisthecase,you’llhavetoworkharder.3)Thecasewassettledoutofcourt.4)Therearethreecasesoffeverinschool.5)Itmayrain----you’dbettertakeanumbrellaincase（以防）.6)Incaseoffire（万一）,ringthealarmbell.7)Inthis/thatcase（如果是那样的话）,nonecanescape. 11.inotherwordshaveawordwithsb.（和某人谈一两句话,和某人谈谈）havewordswithsb.（和...争论/争吵）break/keepone‘sword（食言/失信）beyondwords（无法用语言表达）wordforwordwordbywordwordcamethat…逐字地；原原本本地消息传来 (1).______________,hewalkedawaywithasmile.(2).It’snousetopromise_________,butindeed.（口头上）(3).____________,youareaverygoodboy.（总之）(4).Idon’tknowhowtoexplainthis______(5).IsoonfoundthattheworkIwasdoinghadbeendonebysomeoneelse._________Iwaswastingmytime.WiththewordsinwordInawordinwordsinotherwords 12put…touse=makeuseof（利用;使用）comeintouse（开始被使用）inuse（正在用;通用）outofuse（不用）1)Youshouldputwhatyouhaveto(a)betteruse.=Youshouldmakebetteruseofwhatyouhave.2)Whenwillthetechnologycomeintouse?3)Somethinginusetodaywillbeoutofusesoon. 13.Thelessanxiousandmorerelaxedthelearner,thebettertheirlanguageacquisition.…The+比较级……,the+比较级……,越…...就越……e.g.Themorenovelsyouread,themoreyouwanttoread.Theharderyoustudy,themoreyoucanlearn.Theeasierthetextis,thehappiertheywillbe. 14.takearisk/takeriskstaketheriskofdoingsthattheriskofriskdoingbeatrisk=indangerInourlives,wehavetotakesomanyriskstosucceed.Hetooktheriskoflosinghislifetosavethedrowningboy.Hesavedtheboyattheriskoflosinghislife. 15.Weshouldtrytoadoptsomeofthestudyhabitsandcharacteristicsdescribedabove.…adopt:(1)采用；采取；采纳;吸取，e.g.Ourschoolhasadoptedanewteachingmethod.We’dliketoadoptyouridea. (2)收养（某人）e.g.Theyarenotmyrealparents,Iamadopted.adoptedson/daughter养子/养女 Byebye!'