Dhismaha xarunta gacanta. Tilmaamo Dhismayaasha xarunta unugga

Waxaa caddeeyeen in unugyada noolaha eukaryotic waxaa lagu soo bandhigay xuubka nidaamka, organelles la xirrira protein iyo Halabuurka phospholipid. Si kastaba ha ahaatee, xeerkan waxaa jira marka laga reebo muhiim ah. Laba organelle (dhexda cell iyo ribosome), iyo sidoo kale organelles mooshinka (cilia iyo flagella) waa qaab-dhismeedka non-xuub. Waa maxay waxa ay qabanqaabiyey? In warqad this waxaan isku dayi doonaa in la helo jawaab su'aashan, iyo sidoo kale wax ka baran dhismeedka unugyada ee xarunta gacanta, inta badan loo yaqaan centrosome ah.

in unugyada ku jira xarunta cell oo dhan

Xaqiiqada marka hore in saynisyahano xiiso - waa joogitaanka optional of organelle this. Sidaas daraaddeed, fangaska hoose - Chytridiomycota - iyo in dhirta sare ma aha. Sida ay soo baxday, algae, unugyada aadanaha iyo xayawaanka ugu joogitaanka xarunta gacanta ku lagama maarmaan ah in effectuate habka maytosis iyo meiosis. Habka ugu horeysay in ay la wadaagaan unugyada degaaankaaga, oo tan kalena waxay - galmada. qaybgale qasabka ah in labada geeddi-naxa centrosome ah. Kala centrioles ay ulaha of unugyada kala qaybinaysa iyo therebetween dunmiiqa tensioning iyo dheeraad ah siisaa filaments koromosoom ku lifaaqan, kuwaas oo daah iyo ulo gacanta hooyada.

waxbarashada cqaadir shaaca ka qaaday muuqaalada xarunta cell ee qaab dhismeedka ah. Waxay ka kooban tahay mid ka mid ah in meydadka dhowr cufan - centrioles ka kaas oo fido microtubules fanwise. Waxaan ku baran doonaa si faahfaahsan ka muuqday iyo qaab-dhismeedka xarunta gacanta.

Centrosome unugyada interphase

In wareegga nolosha unugyada ka mid ah xarunta gacanta lagu arki karaa muddada loo yaqaan interphase. Near xuub xuduntii hayaa caadiyan waa laba microcylinder. Mid kasta oo iyaga ka mid ah waxay ka kooban tahay tubules protein ururiyey saddex xabbadood (saddex). Sagaal ka mid ah dhismayaasha, kuwaas oo ay u sameeyaan a centrioles dusha. Haddii laba ka mid ah (oo inta badan u dhacdaa), ay ku yaalaan in kasta oo kale oo xagal quman. Inta lagu jiro muddada nolosha u dhexeeya labada kooxihii dhismeedka gacanta ee xarunta of unug ficil ahaan waa isku mid oo dhan eukaryotes.

ultrastructure ee centrosome ah

Si aad u barato si faahfaahsan dhismeedka of xarunta unug waxaa suurto by isticmaalka microscope electron ah. Seynisyahanno ku ogaaday in dhululubada centrosome leeyihiin dhinacyada soo socda: oo dhererkeedu - 0.3-0.5 microns, dhexroor - 0.2 microns. Number centrioles daruuri labanlaab ka hor inta qeybinta. Tani waa lagama maarmaan si loo hubiyo in hooyada iyo gabadheeda unugyada aad u heli qeybi xarunta unug, oo ka kooban laba centrioles. Features ee xarunta cell ee qaab dhismeedka ku been in xaqiiqda ah in centrioles in ay noqoneyso, ma aha isku mid ah, mid ka mid ah - hagaagaan (hooyaday) - waxaa ku jira waxyaabaha dheeraad ah: satellite peritsentriolyarny iyo appendages ay. centriole qaan gaadhin ayaa site gaar ah loo yaqaan kaalfooto.

centrosomes Habdhaqankiisii maytosis

Waxaa si fiican u la og yahay in koritaanka u shaqeeyo, iyo sidoo kale ay dhalmo dhacdaa qeybta hoose ee heer duur-joogta, taasoo gacanta. Qaab dhismeedka Cell, meesha iyo shaqada unugyada, iyo sidoo kale Cytology organelles ay tixgeliyo. In kasta oo xaqiiqda ah in cilmi ayaa sameeyay wax badan oo cilmi-baaris, Xarunta cell ayaa weli si xun fahamsan yahay, inkasta oo ay kaalin ee horyaalka gacanta si buuxda u elucidated. At prophase maytosis iyo meiosis in prophase of centrioles meiosis fido xagga ulihii ka cell hooyada, iyo sii formation of dunmiiqa dunta. Waxay ku lifaaq u centromeres of koromosoomyada Cidhiidh hoose. Waa maxay sababta ay lagama maarmaan tahay?

Anaphase cell dunmiiqa

Tijaabo ah Boveri, Neil A. iyo aqoonyahanno kale oo ku adkeeyey in qaab dhismeedka of xarunta cell iyo hawlaha ay wada xiriira. Joogitaanka laba centrioles, bipolar amro la eego ulihii ka unugyada, iyo threads dunmiiqa therebetween ay hubisaa in xitaa qaybinta koromosoomyada xiran microtubules, mid kasta oo ka mid ah ulaha cell waalidka.

Sidaas darteed, tirada koromosoomyada waa la mid ah unugyada gabadhii marayo hawlgalka maytosis ama badh (in meiosis) badan gacanta waalidka ee asalka ah. Gaar ahaan xiiso leh waa xaqiiqda ah in qaab-dhismeedka xarunta cell iyo isbedel correlative la xiriira marxaladaha wareegga nolosha unugyada.

Falanqaynta kiimikada ee organelles

Si aad si wanaagsan u fahamto shaqada iyo doorka of daraasadda centrosome, maxay yihiin xeryahooda organic waxaa ka mid ah in ay ka kooban. Sida la saadaalin karaa, ayaa hogaaminaya borotiinada. Waxaa ugu Filan in xusuustaa in qaab-dhismeedka xuub cell iyo shaqo ayaa sidoo kale ku xidhan tahay jiritaanka taagoo peptide waxa ku jira. Ogsoonow in ee borotiinada centrosome hantidaan motility. Waxay qayb ka yihiin microtubules waxaa lagu magacaabaa tubulins. Waxbarashada dhismeedka dibadda iyo gudaha ee xarunta unug, waxa aynu u sheegnay xubno kaabayaal: satalayt peritsentriolyarnye iyo centrioles appendages. Waxaa ka mid ah tseneksin iyo miritsitin.

Waxaa sidoo kale jira borotiinka maamula sarifka lacagaha ee walxaha organelle. tyrosinkinashämmare iyo phosphatase - peptides gaar ah masuul ka ah nucleation microtubule, ie, waayo, formation of the Britain-abuur firfircoon, taas oo ka bilaabanayso ereygu wuxuu ahaa ee koritaanka radial iyo microfilaments.

xarunta Cell habeeye ah borotiinada buunshada

In Cytology ugu dambeyntii loo adkeeyo fahamka centrosome sida organelle ugu weyn ee masuulka ka ah dhismaha microtubules. Thanks to waxbarashada daray K. Fultonamozhno ku doodaya in xarunta gacanta ku bixisaa nidaamka this afar siyaabood. Tusaale ahaan: filaments polymerizing dunmiiqa, la xirrira protsentrioley, la abuuro nidaam radial of microtubules unugyada interphase, iyo ugu dambeyntii, Avv xubno in cilium aasaasiga ah. waxbarashada gaarka ah Tani, taas oo caan ku for centrioles waalidka. By ay baareen dhismaha iyo shaqada xuub gacanta, cilmi ka heli microscope electron ah xarunta cell ka dib markii qeybinta unug mitotic, ama bilowga maytosis hoostiisa. stage G2 ee interphase sidoo kale ku jira marxaladaha hore ee baaba'aa cilium prophase. Sida ay Halabuurka kiimikada ah, waxa ay ka kooban tahay taagoo iyo tubulin waa calaamad oo la go'aamin karaa by centriole waalidka baaluq. Tan iyo koriinkedu of centrosomes dhacaya? Tixgeli oo dhan Gudigga geedi socodka this.

Heerarka centrioles formation

Cytology in hoosaad iyo waalidka centrioles, la xirrira diplosomu ma aha isku mid ah in qaab-dhismeedka. Sayidka, qaab dhismeedka baaluq fringed lakabka walax peritsentriolyarnogo - HALO mitotic. centrioles gabadhii koriinkedu Full qaadan doontaa muddo ka badan muddo hal wareegga nolosha unugyada. Dhammaadka marxaladda labaad ee wareegga cell G1 centriole cusub horeba u adeegtaa sida qabanqaabiyaha ah microtubules iyo awood u sameynta a threads dunmiiqa, iyo sidoo kale in ay formation of dhaqdhaqaaq organelle gaar ah. Iyaga noqon kartaa cilia iyo flagella dhaca protozoa unicellular (tus, Euglena cagaaran, ciliate-kabo), iyo sidoo kale dad badan oo algae Chlamydomonas tusaale ahaan. microtubules Flagella sameeyay xarunta unug, qalabaysan kudka algae badan iyo unugyada jeermiga xayawaanka iyo bini'aadanka.

Doorka centrosome ee dhaqdhaqaaqa unugyada

Waxaan aragnay in mid ka mid ah organelles yar gacanta (qaadataa in ka yar 1% ka mid ah unugyada) ciyaaraa door hogaamineed sharciyeynta dheefshiidka ee dhirta iyo xayawaanka unugyada labadaba. Rabshadaha ee dunmiiqa weeyaan formation of unugyada gabadhii waa hiddo haleysan. sets ay of koromosoomyada waa lacagta caadiga ah oo kala duwan, taasoo keentay in koromosoomyada aberrations. Sidaas darteed - horumarinta shakhsiyaad aan caadi ahayn ama ay dhimasho. In daawada, in xidhiidhka ka mid ah tirada centrioles halista dhalashada kansarka. Tusaale ahaan, haddii unugyada maqaarka caadiga ah ku jira laba centrioles, unugyada biopsy at kansarka maqaarka ah ayaa muujinaya koror ah in ay tiro ilaa 4.6. Natiijooyinkaasi waxay tahay caddayn u ah doorka muhiimka ah ee centrosome ee gacanta ugu qaybsamidda unugga. xogta tijaabo Recent soo jeedin door muhiim ah organelle this ee geedi socodka gaadiidka intracellular. Qaab-dhismeedka gaarka ah ee xarunta cell ogol yahay in la beddelo sida nooc ka mid ah unugyada, iyo isbedel. Sida caadiga ah horumarinta unugyada centrosome ku yaalla meel u dhow qalab Golgi, oo u dhow xuduntii, oo waxaa iyaga la bixisaa dhamaystiran ah iyo digayaan hawlaha hirgelinta maytosis, meiosis, iyo dhimashada unugyada barnaamijkii - apuptoza. Taasi waa sababta cytological casriga ah loo tixgeliyaa ah unugyada muhiim organelle centrosome mideynaya, wuxuu mas'uul ka yahay in labada ay kala qeybinta, iyo dheef oo dhan guud ahaan.