ࡱ> '` RbjbjVwVwH44qRRRRRRRf8fx.&&&~~~xxxxxxx$zh;}d&x9R~>>@~~&xRR&&_xJJJ~R&R&xJ~xJJ~k8RRs& 0]knXxux0xol}d}ss}Rw~~J~~~~~&x&xX~~~x~~~~fff fff fffRRRRRR How Cells Get Around +oekv~ހ  INCLUDEPICTURE "http://www.tingclass.net/uploads/2013/0617/20130617014109593.jpg" \* MERGEFORMATINET  A major reason why many cancers are so dangerous is that they metastasize. This means that instead of staying in one place, the cancer cells migrate from their original site to other parts of the body. No wonder that scientists are busy studying the mechanism that enables cells to move around, in hope of finding a way to control this migration. Whether its an immune cell going off to battle infection, or a cancer cell making its way to a new area of the body, the underlying mechanism for its movement is the same. All non-blood cells are surrounded by a fibrous material known as the extracellularmatrix. Anyway, cells on the go use a point-to-point adhesion system, which functions like tiny hooks, to grab the materials that make up the extracellularmatrix. So, basically, in order to move, a cell climbs hand-over-hand along the extracellularmatrix until it reaches a blood or lymphaticvessel and penetrates it. From there, its smooth sailing. By the way, the thinner walls of lymphaticvessels are easier to penetrate, which is why examining lymph nodes plays a major role in cancer detection. The trick then, is not only to figure out all the factors that affect the chemical reactions that enable cells to move around, but also to figure out how to control these reactions selectively. Because cell movement is necessary for healing wounds and fighting off diseases, stopping it completely isnt an option. Instead, scientists will have to figure out how to block movement in select locations, like in the extra-cellular matrix around growing tumors. LvuvqSiV };N(WNLv~ހly0bc KN Lv~ހ NO[0W_@w SNNSSMOly0RSOvQNMO0yf[[_xvzly~ހvSt ^gb6RLv~ހ y 0 e/f Q w5 b_agvMQu~ހ ؏/f(W y vLv~ހ [NЏRvW,gSt/fv Tv0dN@~ހ vQN~ހGW1u~~ir(~ހYW(SV0yRv~ހǑ(up[pD@wSO| 1\P\N7hUcIcgb~ހYW(vir(0 W,g ~ހz@w~ހYW(yR NeSs@{bm]{ z@{Tm]{ ُ7h1\Eue;N0(*468 (*,.046:<@BFHLN^`鼟ԝԘ}}}}mi^QDhA5CJOJPJo(h>5CJOJPJo(h>CJOJPJo(h>jh>UmHnHsHtHhp Jjhp JUhAhVuaJo( hB9o( hRo(U8jh]h]5B*KHOJQJU\^JaJph/h]h]5B*KHOJQJ\^JaJph)h]h]B*KHOJQJ^JaJph+h]h]5B*KHOJQJ\^Jph* n>(,.248:>@DFJgdA\$gdB9$dwdd1$[$\$a$gd]$dwdd1$[$\$a$gd] $dw1$a$gd].V:Nm]{X_ gfz @bNǏm]vhgSNʋeLvu0 sQ. NNN/f~bQ@b gV }q_T~ހ1uЏRvSf[S^ ؏f}vYUO g b0Wc6RSf[S^0V:N~ހЏR[N$OSaTTbbuusQ͑ [hQb6R~ހЏRv^ NSS0yf[[_{㉳QYUOb6RgNMOvЏR kYv`Sv$vhTVv~ހYW(0      ,TRX,_>e_f[`Ns^Swww.TingClass.net f[ ~,TR N,TRX00MQ9,TR N}0www.tingclass.net -  PAGE 2 -  JL gdA $ 9r a$ `lt ½hAhVuaJo(hp Jh>jh>UmHnHsHtHh]KHmHnHujh>KHU h>KH h>o( hAo(h>5PJo(hg5CJPJo(h>5CJPJo(hA5CJOJPJo(h>5CJOJPJo(0182P. A!"#$%S Fe(ᆆ5lE/JFIFC    $.' ",#(7),01444'9=82<.342C  2!!22222222222222222222222222222222222222222222222222" }!1AQa"q2#BR$3br %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz w!1AQaq"2B #3Rbr $4%&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz ?]m_;Sw:AWm  Q1E~TbQpoa?*]'I1Ea?*7&( ~T\,. RbQpOʍ'I1Ea?*7&( ~T\,Oʍ'F( ~T\,. RbQpOʓ Q1@X7OʌQa?*7&( ?OʓbX]'FpOʍ'I1Ea?*7&(0_ʍ/I1J`~Toa?*1F) Ra?*LQa?*7&( Oʍ'I1Ea?*7&(0Oʍ'I1@X]'F,. RbP Q1F( ~T?Oʏ31F(  Q1@X7. Q1F(X]'F`~Toa?*1F)~Toa?*LQW ~T~TOʌQa`~Toa?*1F)?Oʏ31F(X]'F Roa?*1F) Ra?*LQa?*7&(0_ʍ/I1@X7OʌQ 93?rQ@X|)wLHGQq-len5Olnx#NOP~DmTQFn+Ѷfꆒhcid8P(_ȷъlDo5Comg*eIA)lG1OK(?mhh.6s\p7I7b\QnzQ"q6"vь ."H"#j]bづpS=1[:}/je+#ZTi ¬ool9" K59j5K, avk k莢v üVL5"\٢:ܽozv1VԬtg+Xe9ӬZM~SWө*j5Fڗ0h ms\]1R9m,Q6+bThEbIъOnh TX.h(M2F&8b,Qoh ThEbF.X.6p"vѶ(Km=bFxO=E IRcCvmT\֍'Vdn۟җs$erW"vm]KbTi LW3x,j%-khZmD@qҺ'*Z cCbcFk]; SyDk0.{f$+ԋj@9XszcAwd/_fG kXu8t{ӴrH׊xZG밸mWofWv޽jg*RK3F:s^eZr7 nZbThYdX}E.xoI"E3mX~m`*]p%7C50+[W4`w?BE}kA&Gj,aKN;נBA\$kAh7h1Y΃aè6YZX]Ƅ|ָs|!(J޻kKTcCjEu #|!N3:j1km8DǠB(cZm7;C{isW` 9pNEbkEQjR u<+pF< 6Ը R$[޹z؀Fǵ1+noW_C~JA(ZѤ ~鰅d!mqֺ֛pC ]u B9BTD&%KhzOO%O²)ZYU:Uܲ'v}fe ԥ,)kIn߸Zd1Ԥ *QW71VQݘ5^On^Eti JcTӛ9tpFOL7 *<9 NqY6Ȼ\VR+.M>kFC[I.Oƌi2o4t ccǨ fE4vH5nzpTR{}(Rcg8>Z[hVţc&HYis#HќCvѶ eNEsN5gfF8k==2Օ4cJKmw˴,O͎+9˱߆J9.kMٌpuf^L è RS +R4M66ub\}==u*Ȱ?6)]/Hs}zHaڄfpIHI}%bh򿈿.B#Fړm.(XmjPm-mvѷҀ"Fڗo4m,E.Z6"FڗnzV}ޡTJ* "|ܷ9mT,{X33隣_PTa\{tw,Ԓ]Jߝc=<]K ]jMJxXES޷2!~2kGh8\V] A>k헶F-62dTk[|'Ј-ILԯp 拭kM\ÊUTt;0 %f9p c3&vZX&F}j-o0-ұ^h0Yu\>%JK6hZyǜ֊O+VEG-/$sX(W'*u:ZvhR.A.UϖB-#<$wkjqO@*4i/X\^z)1KޖC/n̚dc\ME7>s=kv67|`K 2+׆*,hJ6VR>,2i6dOq\楯 gpZ3Z~;7dU,Ij"lR`HN{ip $JAwS]։EiĊ7c\ʐ1wpOznjC? ^2M#[>$m>e ~x}Zx,qںn[)4KqA^Khrpε!E/ym}|״4!ROz׾cj˭g^jcd+晦f=jiX[T p4ru@[PF=+Xg+Ѿ]KFژRm6m徢mQq8pt"i4mc*| EQ-z@j;W:nB<~lMwe;J[&M4bN$I+f1qOϴV'qfyYM= ZDøtEpx:z%\Dt4'Iê, Dtk'W$b\tu Vsg4d]bJ vѶongB].cXЩ((ojMTl|C`۲E]H1 |& s9Ft$En}ԶLF8j-(Fn3s9QU+NQIc HW Mj]{%%լ:IzmYڷuIIBWSjV94}/M!@Mw­gkD{*v)E⍵&]Qx_?S%~JsQ2=j]mv2/cU[sW Jd+}> zpF\ e^T"*`kSmC5`Sʔns(b%ŸMkU`θD&M=cpq \k*HԐt$MTiiS۸lbX|z8)sXF̍9nrr|'J-H9,QJ԰FpV3Tuב\k9<ҭk:\tc(}+4ΥJc ӭ S:_8,tΜѓkÿ5FGZiR10H>L!J_d8=kWU{"#\Ɇpm9l<EWYl>Ϳ=kBA_e]f)eaUt5mbwrX C{⋋O_F;9B1ޝ%%C-O6ppkKDqKK`S|:3nN(G)k 4m<)k!Vn9ou$۹`TUƕ81Sˡ׎F驏2~LӼQ. X'&k3/LoԛyJvZ璢DrĥGRkmf[[j9֦[zֽ6QG߾R 7v0PsS V4snO|nGq)ELT][GN-HT<Uk u[ߗBDBWwbZ4){ zFڗn(Z\lE M:$^j=V`v4c-zV,>U5ak wJ9b$~\V}xz۹[H&AVΣ"}j#$U֤|W^C?xutNGt?Ak9NX۞PP.Ǟmɮ{`Q0* 8.+(\&mWcLŖVZ=o{G1{yfi$Q!)ӥXXz҂5]}Н[-t./Ρ]ΒEMد56ԻhHv"RE.ڐ/(,?ڱ*EGmI1@G&(G&(b=m1F(F*Mmv#1F( mI1@/81Fs@XaqT5;zҺ$7 v8u#3oz8D12"G­.Nsj6"F*LfeY]NIN+mAԛsF(9''yjdh]H栏öyQ[i1AбU- Dz5T0Ի} A)>gtss9%QBv@RJw3nt.P 2E~2}[sE^^[:U &ڴ6D'(;d>d`EQʭIi3.G_19ϦE=ÑZ8qA_X{R݂]B#aK8qҍǕhRmmv#6Ѷ#F>jmxzGQՈO5Gƣ)$w->>f*V'c-[䌶3Xk>q SȭmSjt:wqZ 8cƠNRsv*\YEvp)!ӭKUQ4/M.[G(I6ӹ#jMbG&(F*LQW0"P*6ӻb=m1F)dQmV YW+֩^+OmSKYL wĵHtpI{W36F7,-@WAFLNRSR2>ZaZP`JQROC&&O5-5OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO:!1AQ"aq2B#R$3CSbr0!1A"Q2aRq#B ?NIg5{kQlME`v3`R !'!mC*8Gk,Uhn3h:tQfY[<8O9z&nwQ.e/KP7^1KT ޽!i$'LI[U|4r fO@{90R6 p\`׊$mLRdbd0xأVS"d./ Mq VO  !(^[-恁ڧiۗ+!q'#6$0RyڏM5=M KpY ]Wd@9θbC_eoԼY ;yu;GSK@a>CxE jm⮸KB`恱gX`0vѣZL?U[k)|+a7ӝI9%-rKNJ9 *oAɩјeqN\vLpHyA#vwȈ2Z$?vGƒcOwʽ n*pRV"E^Q@a5mm1]E{ ?A8gKE|U;$_"A!eÞ =1Gޠ jt'}( (2{RZ>JĿR ::s8rVSMc3Jϧ:#*<ҭ6 ć p6[r$HFTvlNu/qKʿ~X:yGm2Ɔ+ vtNcbS  P!`,;ձ=jwm08wFwS8ᇚ ӪbȴLʊ qQ"7kGӋ'eў2zVzԸFrI,2jFg%0D5ixIF?IdM])$F,p{dk  qZe(aJS?ZP//U]fp~y"ܤƠS)i[1,NjnQ楕GB.0) !'& #z; n.==x+'tƭc *NܟZ1|pyVg9n*Js쌫E-*|Uf$FTgQ^rHҮ-ȥ)ڤj08;KC*c kuycoof'g,{oB3˦_I+d9Pu7G|_̃DY;RmY|uHH#wj凌2/Õy |Jt?KȲ:8l.{ձL UK_d=5V=l/o\ 1!_Q$qP6ܑ,#8_ҁjYOjmhWYyeac";ti}/ y5&LNR1a1gN1?5{b{ƺߡE)z K3&Hjp2jpATAyۊ1uGu'm#YK?PLIym{5jY% F2Or*m\ ҲG oR)Zyfl }+#H '4Fd䲾* vHAwjo[H:r{k U;ҳgWnt-3SଠΒil țӱܜy2nqGihsS.1V^ lUcVV P:d3BM&;*r uR/5HWV 3\u*3u=Dsk"9 }3BF4̓CF"0i\ztދXՉc&[ER19m"5NN,VVe瞅3AsCT.*iPpN7&0P4a>nZQ *Qvw/фU}}it#+"'Z!xt*%8"$4`\Gٕp"FVnX`5J0~3W؟1b5UA ޺ZX>j:q.G3$R!ރ-\B;!} :ORF<He%*%+"d62NGM^5'vouG3 k&xb0~WK>{FݪG{IJF}xmeSK[Icc$&FRNWY VPd# @WALr!z=K`N+>z7=-^r椳 >r~=v%= ;B+&&YAW݇5qaeI3:T>,Bg$GZ8hكY]]E!RIU8m[az%W)\yzǻ3ybYԣrWDHBf9LC战DY`:ʓ$E(r0xJl0Ųs WpiDlZDaʖ2GXi@Z]L}hg<[A0ffVcL`]< N2JXIccxP[$B ȩ8l9ޅ4>ISp<;*R7K]xgflO&''{ZPCڪm(F扁 E^-[Z} 4,maAAvVsW8U֎b>4LU~whMTĉI#Ui> ֓ ѤAn=h;VV= fT01^! uwA^yghh([<r9?+]'aVѣtҘX*vQ?fm}odHûSP\U-d=6N ]fx542d̗#&@qM9GfV9vhŦܑW%NFI%Tڹl6_+bN}qԳ>0}kJFTEQsYW3e tY(Kg4EiXF]![$Y*pjr 2R PdwUpF[ʲk>y@Q bR24#9oȳXG ,qA*h,#/l~C%h#3n k BhDvGݝ;wJ!J0FV C$ȱc 97.N}~qq{)ii^7ϦF5@c@?J+^zxdY2!<Ҏ#5F.Ygޥ<-a`v"9b,TƷ (7k(|R4+W.<06*0Hd{T) Xy PMKn̊ϟɪUj*XFR@Ҥd yo#uPIG?7X[hXPBTS\.\ЬrsIKҎ㡨1:dE0p%:匘OS lj#kyf>J1DZ5joZ!nA'#GCrc YNHwp?ӺlQ4i* 0H4RCf=S5$5c1y<(dvub46ΙCǔ!W\ڮ{aq4BPZr MF#=kͩdO"rIjUty `_X@}ѻYp3gLfQ(gik&JFYh( (U(3OjÊ3ͳ^7QQWqMCQ߳~_WWy]M;\#.3 Z 5I(t%bSf}lWqlk)׈4 %G9\Ce_@ [K2F/hC81uFv [._=_VyCmj4cc,,kٷ*"X@" :_6]TO!T phonetic2*B*`JphfffCJOJQJo(^JaJ5\.O1. caption15\`^@B` nf(Qz)!dXD[$dYD\$a$$1$CJOJQJ^JaJKH8 @R8 ua$$G$ 9r CJJ@bJ u w'a$$G$&dP 9r CJ^\@^ z-zSOvza$$1$&dPCJOJQJ^JaJ<KH^]@^ z-zSO^za$$1$$dNCJOJQJ^JaJ<KHVOV /\8 Char Char*5CJ,KH,PJ\_HaJ,mH nHsH tH^O^ /\8 TopSage.com& 8NWD8XDdYD^` CJaJfOf /\8TopSage.com Char Char$CJKHPJ_HaJmH nHsH tHHOH /\8paraN.WDXDYD`CJaJNON /\8 para Char$CJKHPJ_HaJmH nHsH tHDOD /\8ParaheadWDXD2`5ROR /\8'Y[Q* NNVDWD8XDYD^` CJaJJOJ !/\8reply N.VDXDYD^CJaJPOP /\8 reply Char$CJKHPJ_HaJmH nHsH tH6O"6 -/\8answer"d,CJaJXO12X /\8bt3##$$$dh2@& XD2a$B* CJ\aJphhOABh %/\8bt4'$$$$d,d@& XDdYDa$ B* CJOJPJQJ\aJph3XOQX $/\8bt4 Char05B* CJKHPJ_HaJmH nHph3sH tHHObH /\8Y/N"&   VDWDP^ `56FOrF /\8bt$'$WDXD2YD2`a$5)@ /\8uxbOb /\8 Directions&)-WDXD2YD2^-`6CJ]^JNON /\8bt2*$dhXD2a$5B*CJ\^Jph33VOV /\8readme,+\dN.WD8XDYD^`\aJFOF /\8 SampleAnswer,$`a$5ROR "! answer Char$CJKHPJ_HaJmH nHsH tH8O8 n6c cnn_dynone1 <e@ G HTML IZJ  7tL,0[uO  {QkP 2HTQ9HI ;U[aOC>E:{cG@ gB4hh!<A&6]?YRR1gzV*@P,4PP@PPUnknown Gz Times New Roman5Symbol3& z Arial7&  Verdana;[SOSimSun;5 wiSO_GB2312;ўSOSimHeiO& k9?Lucida Sans Unicode;Wingdings Qhwi' 66!Z&!),.:;?]}    & 6"0000 0 0 00000 =@\]^([{  0 0 00000;[2q ?'*22 Normal.dotUnit 1 guoyaxinUser)                           ! " # $ % & ' ( Oh+'0  8 D P \hpxUnit 1  guoyaxin Normal.dotUser10Microsoft Office Word@ @ 5O@rvɝ-@~D?k6՜.+,D՜.+,D   $,4<WWW.YlmF.CoM' ` ?GKSOProductBuildVer2052-6.6.0.2461  !"#$&'()*+,-./012345678:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxz{|}~Root Entry F]kData %W'1Table9O~WordDocumentHSummaryInformation(yDocumentSummaryInformation8CompObjm  FMicrosoft Office Word ĵ MSWordDocWord.Document.89q