Qhov sib txawv tseem ceeb ntawm zona pellucida thiab corona radiata yog zona pellucida yog ib txheej uas tsis yog cellular secretory glycoprotein uas nyob ib puag ncig lub plasma membrane ntawm mammalian ovum thaum corona radiata yog follicle cell txheej uas nyob ib puag ncig zona pellucida.
Nyob rau hauv fertilization, ib tug laus ovum fuses nrog ib tug phev. Feem ntau, fertilization tsuas yog nyob nruab nrab ntawm ib tug phev thiab ib qho zes qe menyuam. Txhawm rau tiv thaiv cov phev ntxiv los ntawm kev nkag mus rau hauv cytoplasm ntawm zes qe menyuam, muaj ob peb txheej tiv thaiv nyob ib puag ncig lub zes qe menyuam. Zona pellucida thiab corona radiata yog ob txheej tiv thaiv uas nyob ib puag ncig thiab tiv thaiv lub zes qe menyuam. Zona pellucida yog glycoprotein plhaub uas tsis yog cellular thaum corona radiata yog cellular txheej.
Zona Pelllucida yog dab tsi?
Zona pellucida yog glycoprotein txheej uas nyob ib ncig ntawm lub plasma membrane ntawm mammalian ovum. Qhov tseeb, nws yog lub tsho tiv thaiv glycoprotein lossis lub plhaub ntawm ovule. Nws yog txheej tsis-cellular, tsis zoo li corona radiata. Nws yog ib yam ntawm cov tuab extracellular matrix secreted los ntawm oocyte thiab cov follicle granulosa hlwb. Muaj plaub hom glycoproteins hauv zona pellucida li ZP1, ZP2, ZP3 thiab ZP4. Lawv ua tiav lub luag haujlwm sib txawv hauv kev yug menyuam.
Daim duab 01: Zona Pellucida
Zona pellucida tso cai tsuas yog ib cov phev nkag mus hla nws mus rau cytoplasm ntawm ovum (monospermy). Yog li ntawd, nws tiv thaiv kev nkag mus ntawm cov phev ntxiv hauv. Hauv lwm lo lus, zona pellucida tiv thaiv tus mob hu ua polyspermy. Thaum cov phev hu rau zona pellucida, lawv khi nrog cov receptors ntawm zona pellucida. Tom qab ntawd, lawv pib cov tshuaj tiv thaiv acrosomal nyob rau hauv uas cov enzyme uas muaj lub kaus mom lossis acrosomes ntawm cov phev pib degradation ntawm zona pellucida thiab tsim ib txoj hauv kev rau cov phev mus ze rau ntawm cov plasma membrane ntawm lub zes qe menyuam. Tom qab ntawd ib leeg phev ua rau kev sib cuag nrog cov phev-binding receptors ntawm oocyte's plasma membrane. Thaum kawg, cov phev fuses nrog oocyte's plasma membrane thiab ua tiav hauv kev sib xyaw nrog ovum nucleus.
Corona Radiata yog dab tsi?
Corona radiata yog txheej txheej ntawm follicular cell uas nyob ib puag ncig lub zona pellucida ntawm lub zes qe menyuam. Nws ua haujlwm raws li kev tiv thaiv cell thaiv rau lub zes qe menyuam, zoo ib yam li zona pellucida. Corona radiata tso cov tshuaj lom neeg rau cov phev. Yog li ntawd, corona radiata attracts ntau pua cov phev mus rau lub zes qe menyuam.
Daim duab 02: Coroma Radiata
Ntxiv mus, corona radiata muab cov protein tseem ceeb rau lub zes qe menyuam. Nws yog tsim los ntawm cov follicle hlwb adhering rau oocyte.
Dab tsi zoo sib xws ntawm Zona Pellucida thiab Corona Radiata?
- Zona pellucida thiab corona radiata yog ob txheej tiv thaiv uas nyob ib puag ncig ib puag ncig oocyte lossis loj ovum.
- Ob txheej tiv thaiv lub zes qe menyuam.
- Ntxiv mus, lawv tiv thaiv kev nkag mus ntawm cov phev ntxiv hauv cytoplasm ntawm zes qe menyuam.
- Enzymes uas nyob hauv cov phev acrosomes degrade ob corona radiata thiab zona pellucida.
- Yog li ntawd, ob qho tib si zona pellucida thiab corona radiata tau txais cov tshuaj tiv thaiv acromosomal.
Qhov txawv ntawm Zona Pellucida thiab Corona Radiata yog dab tsi?
Zona pellucida yog ib qho tuab tuab ntawm glycoprotein lub tsho loj uas nyob ib puag ncig lub zes qe menyuam. Hauv qhov sib piv, corona radiata yog txheej txheej tuab ntawm granulosa hlwb uas nyob ib puag ncig zona pellucida. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm zona pellucida thiab corona radiata. Functionally, zona pellucida tiv thaiv kev nkag mus ntawm cov phev ntxiv rau lub ovule thaum corona radiata tiv thaiv zes qe menyuam thiab tseem muab cov proteins rau lub zes qe menyuam. Yog li, qhov no yog lwm qhov sib txawv ntawm zona pellucida thiab corona radiata.
Ntxiv mus, zona pellucida muaj glycoproteins, thiab nws yog ib txheej uas tsis yog cellular thaum corona radiata yog txheej cellular. Yog li, peb tuaj yeem xav txog qhov no ib yam li qhov sib txawv ntawm zona pellucida thiab corona radiata.
Summary – Zona Pellucida vs Corona Radiata
Zona pellucida thiab corona radiata yog ob txheej tiv thaiv nyob ib ncig ntawm lub zes qe menyuam. Zona pellucida ncig lub plasma membrane ntawm zes qe menyuam thaum corona radiata ncig lub zona pellucida thiab tiv thaiv lub zes qe menyuam. Zona pellucida yog pob tshab, tuab glycoprotein plhaub thaum corona radiata yog follicular cell txheej. Ob leeg zona pellucida thiab corona radiata tiv thaiv kev nkag mus ntawm ntau tshaj ib cov phev hauv lub cytoplasm ntawm lub zes qe menyuam. Qhov no qhia txog qhov sib txawv ntawm zona pellucida thiab corona radiata.
