![Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins? Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins?](https://i.answers-medical.com/preview/medical-health/13907085-how-does-the-fertilization-membrane-form-in-sea-urchins-j.webp)
Video: Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins?
![Video: Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins? Video: Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins?](https://i.ytimg.com/vi/UDBk7WVzG6I/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov hiav txwv urchin fertilization hnab ntawv (FE) yog tsim tom qab thawj zaug phev-qe cuam tshuam los ntawm lub qe nto vitelline lub hnab ntawv (VE) thiab cov protein paracrystalline feem (PCF), muab tau los ntawm cov noob qoob loo.
Ib yam li ib tus tuaj yeem nug, lub hom phiaj ntawm lub hnab ntim fertilization hauv hiav txwv urchins yog dab tsi?
Hauv hiav txwv urchin, cov ntsiab lus ntawm cov pob zeb cortical tau zais tsis pub dhau 30 vib nas this ntawm kev sib deev. Ob peb ntawm cov ntsiab lus protein no khi rau txheej txheej vitelline pib ntawm qe thiab nqa tawm ntawm cov xovtooj ntawm tes los tsim kom ruaj khov, tsis tuaj yeem, lub hnab ntim cov chiv.
Qhov thib ob, ua li cas cov qe ntses hiav txwv sau? Qe thiab phev ntawm dej hiav txwv yog sau los ntawm kev txhaj tshuaj 0.15 ml/nti ntawm qhov dav ntawm 0.55 M KCl nrog rab koob me me li sai tau (25 ntsuas los yog li ntawd) rab koob nkag rau hauv lub cev kab noj hniav ntawm qhov sib txawv ntawm cov ntsiab lus sib txawv hauv peristome (cov mos mos nyob ib puag ncig lub qhov ncauj kab noj hniav).
Ntev npaum li cas hiav txwv urchin fertilization siv?
Cov xim colloidal number ua tsis nkag mus rau lub tsho tiv no jelly. Cov qe yog 80 inm txoj kab uas hla. ntim rau hauv dej khov, cov phev yuav muaj peev xwm ua tau fertilization rau 4 hnub. Dej hiav txwv spermatozoa (phev) yog cov hlwb me me uas nchuav tawm ntawm tus txiv neej gonopores tom qab txhaj tshuaj 0.5M KCl.
Qhov tseem ceeb ntawm lub hnab ntawv fertilization yog dab tsi?
Raws li cov lub hnab ntawv fertilization nce, cov phev tsis-fertilizing raug tshem tawm ntawm cov qe ntshav daim nyias nyias , thiab raws li lawv tsis tuaj yeem hla dhau lub hnab ntawv fertilization , lawv raug tiv thaiv kom tsis txhob nkag mus rau hauv lub qe. Yog li ntawd, cov tshuaj tiv thaiv kab mob tiv thaiv kab mob polyspermic fertilization , kev tshwm sim tuag taus
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Meninges: peb daim tawv nqaij sib txuas ua ke uas ua kab rau pob txha taub hau thiab "vertebral kwj dej" thiab kaw lub hlwb thiab tus txha caj qaum. (
Yog vim li cas fertilization sab nraud tsis zoo rau cov tsiaj ntau dua li fertilization sab hauv?
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Vim hais tias tus txiv neej ncaj qha tso cov phev mus rau hauv poj niam lub cev, tsawg gametes yuav tsum tau. Kev cog qoob loo sab nrauv xav kom txiv neej thiab poj niam tsiaj tsim cov lej loj ntawm gametes. Ua kom muaj ntau qhov gametes xav tau lub zog ntxiv, uas tuaj yeem ua rau cov tsiaj tsis zoo
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Microbes nyob hauv qee qhov chaw huab cua tshaj plaws, los ntawm cov cua kub npau npau rau cov pas dej hauv av hauv Antarctic. Lawv txawm yog thawj lub neej nyob hauv ntiaj chaw, tsis muaj oxygen nyob hauv dej hiav txwv thaum ub. Lawv tuaj yeem ci, pab tsim huab, thiab tsim ib qho ntawm cov tshuaj lom tuag nyob hauv lub ntiaj teb
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Cov xovtooj ntawm tes muaj thaj tsam hu ua lipid rafts uas muaj cov roj cholesterol thiab gangliosides. Cov protein sib xyaw ua kom puas lub cell membrane thiab cuam tshuam kev sib txuas lus ntawm cov hlwb hauv lub hlwb, ua rau poob ntawm kev nco thiab kev paub txog kev ua haujlwm hauv Alzheimer's disease
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Lub cev nqaij daim tawv nqaij yog nyob ib puag ncig los ntawm lub plasma membrane hu ua sarcolemma, uas muaj sarcoplasm, cytoplasm ntawm cov leeg nqaij