Video: Neoblast yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev txhais ntawm neoblast .: ib yam ntawm ntau yam loj undifferentiated hlwb ntawm annelid worms uas koom rau hauv regeneration ntawm poob qhov chaw.
Ib yam li ib tug yuav nug, Neoblasts yog dab tsi thiab lawv lub hom phiaj yog dab tsi hauv planaria?
Planarians yog flatworms muaj peev xwm rov tsim cov ntaub so ntswg uas ploj lawm tom qab raug mob. Regeneration nyob rau hauv lub planarian Schmidtea Mediterranea xav kom cov pej xeem ntawm mesenchymal hlwb hu ua cov neoblasts , uas tsuas yog faib cov hlwb ntawm cov laus tsiaj.
Tsis tas li ntawd, tib neeg puas muaj Neoblasts? Hauv tib neeg , tsis paub pluripotent qia hlwb nyob tom qab yug me nyuam. Hauv planarians, lawv nyob ib puag ncig rau hauv cov neeg laus, qhov chaw uas lawv paub tias yog cov neeg laus pluripotent qia hlwb lossis cov neoblasts . Qhov ntawd yog kev ua haujlwm ntau, tsuas yog txhawm rau nrhiav ib lub xovtooj ntawm tes uas haum rau lub luag haujlwm txhais ntawm qhov tseeb neoblast.
Tom qab ntawd, ib tug kuj yuav nug, yog Neoblasts multipotent los yog pluripotent?
PLURIPOTENT cov hlwb tuaj yeem tsim cov hlwb feem ntau, tshwj tsis yog cov placenta (hauv cov tsiaj txhu), thiab yog li tsis tuaj yeem pib lub cev tshiab. MULTIPOTENT cov hlwb tuaj yeem tsim cov hlwb hauv cov ntaub so ntswg, xws li ntshav. Planaria muaj cov hlwb totipotent - cov ' cov neoblasts ' - uas faib los ntawm mitosis.
Planarians siv li cas rau kev tshawb fawb?
Vim yog cov cwj pwm txawv, cov planarian feem ntau yog siv raws li tus qauv tsiaj hauv neurological kev tshawb fawb . Tshwj xeeb (vim lawv cov khoom siv rov ua dua tshiab), cov kws tshawb fawb ntseeg tias kev kawm lawv tuaj yeem ua rau muaj kev nce qib tseem ceeb hauv kev kho mob rau cov tib neeg uas muaj lub hlwb puas lossis lwm yam kab mob neurological.
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