Qhov sib txawv tseem ceeb ntawm qhov sib txawv thiab asymmetric qia cell faib yog tias symmetric qia cell faib ua ob lub hlwb sib txawv los yog ob lub qia hlwb uas sib npaug ntawm cov xov tooj ntawm tes thaum asymmetric qia cell faib ua ib qia thiab ib qho tsis yog qia cell, uas muaj txoj hmoo sib txawv.
qia hlwb yog cov hlwb tsis muaj qhov sib txawv uas tuaj yeem loj hlob mus ib txhis. Lawv tuaj yeem sib txawv rau ntau hom cell. Stem cells yeej faib asymmetrically. Txawm li cas los xij, lawv kuj qhia txog kev faib ua symmetric. Thaum stem cells faib symmetrically, niam qia cell tsim ob tug ntxhais cell nrog sib npaug txoj hmoo. Hauv qhov sib piv, thaum leej niam qia cell faib asymmetrically, nws tsim ob lub hlwb nrog txoj hmoo sib txawv.
Symmetric Stem Cell Division yog dab tsi?
Symmetric stem cell division yog ib qho ntawm ob hom cell division uas qhia los ntawm qia hlwb. Nyob rau hauv symmetric stem cell division, niam stem cell tsim ob lub hlwb sib txawv los yog ob lub qia hlwb nrog sib npaug txoj hmoo. Thaum lub sij hawm symmetric cell division, cell fate-determining yam tseem ceeb yog sib npaug zos rau ob tug ntxhais cell, uas ua rau sib npaug cell fates. Ntxiv mus, spindle orientation thiab determinant protein localization tsis ua hauj lwm nyob rau hauv symmetric qia cell division.
Daim duab 01: Symmetric Stem Cell Division
Lub luag haujlwm tseem ceeb ntawm kev faib cov qia cell yog kev loj hlob. Raws li qhov tshwm sim, cov neeg ntawm tes nthuav dav. Tsis tas li ntawd, symmetric qia cell division plays lub luag haujlwm tseem ceeb hauv cov neeg laus mammalian homeostasis. Txawm li cas los xij, tsis muaj kev tswj hwm ntawm tes sib faib yog qhov tseem ceeb thiab yog qhov tseem ceeb ua rau mob qog noj ntshav.
Asymmetric Stem Cell Division yog dab tsi?
Asymmetric qia cell faib yog ib qho tseem ceeb ntawm cov qia hlwb. Thaum lub sij hawm kev loj hlob ntawm lub cev, asymmetric qia cell division predominates. Thaum leej niam qia cell faib cov asymmetrically, nws tsim ob lub hlwb zoo sib xws nrog cov xwm txheej sib txawv. Feem ntau, ib lub cell yog qia cell thaum lwm lub cell yog ib tug txawv cell. Ob lub hlwb no muaj qhov sib txawv, sib txawv morphology, thiab txawv cov qauv qhia cov noob. Tus ntxhais sib txawv ntawm tes mus raws li cov kab mob tshwj xeeb thaum tus ntxhais qia cell rov ua dua nws cov qia cell thiab txuas ntxiv sib faib asymmetrically. Qhov kev muaj peev xwm tsim tau ob lub hlwb sib txawv nrog txoj hmoo sib txawv yog vim li cas rau kev sib txawv ntawm tes pom nyob hauv txhua lub cev muaj kab mob ntau.
Daim duab 02: Asymmetric Stem Cell Division
Thaum lub sijhawm asymmetric qia cell faib, cell fate determinants cais tsuas yog nyob rau hauv ib tug ntawm ob tug viv ncaus hlwb. Tsis tas li ntawd, cov proteins thiab lwm yam khoom ntawm tes, xws li mitochondria lossis mRNA, kuj faib tawm asymmetrically. Tsis tas li ntawd, thaum lub sij hawm asymmetric qia cell faib, spindle orientation thiab determinant protein localization yog sib koom ua ke.
Dab tsi zoo sib xws ntawm Symmetric thiab Asymmetric Stem Cell Division?
- Symmetric thiab asymmetric cell divisions yog ob hom cell faib qhia los ntawm qia hlwb.
- Ob tug ntxhais lub hlwb raug tsim tawm hauv txhua lub cell faib.
- Ob hom kev faib ntawm tes yog qhov tseem ceeb rau ntau cov kab mob.
Qhov txawv ntawm Symmetric thiab Asymmetric Stem Cell Division yog dab tsi?
Symmetric stem cell division tsim ob lub hlwb sib txawv lossis ob lub qia hlwb los ntawm niam qia cell. Nyob rau hauv sib piv, asymmetric qia cell faib ua ib qia cell thiab ib tug txawv cell los ntawm ib tug niam qia cell. Ob tug ntxhais hlwb uas tshwm sim los ntawm symmetric qia cell division muaj tib txoj hmoo thaum ob tug ntxhais hlwb tshwm sim los ntawm asymmetric qia cell division muaj txoj hmoo sib txawv. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm symmetric thiab asymmetric qia cell faib.
Cov hauv qab no infographic teev ntau qhov sib txawv ntawm symmetric thiab asymmetric qia cell faib hauv daim ntawv.
Summary – Symmetric vs Asymmetric Stem Cell Division
Cov qia hlwb faib symmetrically lossis asymmetrically. Symmetric qia cell faib ua ob lub hlwb sib txawv los yog ob lub qia hlwb uas muaj txoj hmoo sib luag. Asymmetric qia cell faib ua ib qho sib txawv ntawm tes thiab ib lub qia cell uas muaj txoj hmoo sib txawv. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm symmetrical thiab asymmetric qia cell faib. Ntxiv mus, asymmetric qia cell division predominates thaum lub sij hawm txoj kev loj hlob ntawm ib tug kab mob. Qhov tseem ceeb, kev tswj tsis tau symmetric qia cell faib tuaj yeem ua rau mob qog noj ntshav.
