Cov txheej txheem:
Video: Dab tsi yog ob hom qia hlwb?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Muaj peb leeg hom qia hlwb : neeg laus qia hlwb , embryonic (los yog pluripotent) qia hlwb , thiab ua rau pluripotent qia hlwb (PIB).
Ib yam li ntawd, ob hom qia hlwb yog dab tsi?
Muaj ntau hom qia hlwb uas tuaj yeem siv rau lub hom phiaj sib txawv
- Embryonic qia hlwb. Embryonic qia hlwb los ntawm tib neeg lub cev embryos uas muaj hnub nyoog peb txog tsib hnub.
- Non-embryonic (tus neeg laus) qia hlwb.
- Induced pluripotent qia hlwb (iPSCs)
- Cord blood stem cells thiab amniotic kua qia hlwb.
Kuj Paub, ob hom qia hlwb yog dab tsi thiab lawv tuaj yeem pom nyob hauv tib neeg lub cev li cas? Neeg laus qia hlwb muaj tau txheeb xyuas hauv ntau lub cev thiab cov ntaub so ntswg, suav nrog lub paj hlwb, pob txha pob txha, cov hlab ntshav sab hauv, cov hlab ntshav, cov leeg pob txha, tawv nqaij, hniav, lub plawv, lub plab, lub plab, daim siab, zes qe menyuam epithelium, thiab cov leeg. Lawv yog xav rau nyob hauv ib cheeb tsam tshwj xeeb ntawm txhua cov ntaub so ntswg (hu ua " qia cell qhov chaw ").
Kuj paub, ob hom qia hlwb yog dab tsi thiab lawv txawv li cas?
Embryonic qia hlwb tuaj yeem ua txhua yam hom xov tooj ntawm lub cev vim lawv yog pluripotent. Neeg laus qia hlwb tau xav tias yuav txwv rau kev sib txawv rau hauv hom cell sib txawv ntawm lawv cov ntaub so ntswg ntawm keeb kwm. Embryonic qia hlwb tuaj yeem loj hlob kuj yooj yim hauv kab lis kev cai.
Dab tsi yog ob hom qia hlwb hauv cov tsiaj?
Stem cells txawv ntawm lwm yam hom ntawm hlwb hauv lub cev. Txhua qia hlwb -lawv tsis suav nrog lawv cov peev txheej-muaj peb yam khoom dav dav: 1) lawv muaj peev xwm faib thiab rov ua lawv tus kheej tau ntev; 2 ) lawv tsis tshwj xeeb; thiab 3) lawv tuaj yeem ua rau muaj kev tshwj xeeb hom xov tooj.
Pom zoo:
Puas yog medulla oblongata hauv lub hlwb qia?
Medulla oblongata (myelencephalon) yog qis ib nrab ntawm lub paj hlwb txuas ntxiv nrog tus txha caj qaum. Nws sab qaum yog txuas nrog cov pons. Medulla muaj lub plawv, ua pa, ntuav, thiab vasomotor chaw tswj hwm lub plawv dhia, ua pa, thiab ntshav siab
Cov qia hlwb ua dab tsi nrog Planaria?
Cov tsiaj no tau hloov pauv qhov tseem ceeb ntawm cov qia cell. Ib tus neeg laus pluripotent qia cell hom ('neoblast') ua rau muaj ntau yam ntawm cov xov tooj ntawm tes thiab cov khoom nruab nrog cev hauv cov phiaj xwm lub cev, suav nrog lub paj hlwb, digestive-, excretory-, sensory- thiab kev ua me nyuam
Dab tsi yog txheej txheej epidermal nrog qia hlwb?
Epidermal qia hlwb yog lub luag haujlwm rau kev rov tsim dua tshiab txhua hnub ntawm cov txheej sib txawv ntawm daim tawv nqaij. Cov qia hlwb no tau pom nyob hauv txheej txheej hauv qab ntawm daim tawv nqaij. Cov hauv paus plaub hau plaub hau ua kom ruaj khov txuas ntxiv ntawm cov hauv paus plaub hau
Dab tsi yog 3 hom hlwb pob txha thiab lawv lub luag haujlwm yog dab tsi?
Cov pob txha tau tsim los ntawm peb hom cell hom: Osteoblasts, Osteocytes thiab Osteoclasts. Osteoblasts: Osteoblasts yog cov pob txha tsim cov hlwb uas nqis los ntawm cov hlwb osteoprogenitor. Osteocytes: Osteoclasts:
Dab tsi yog qhov txawv ntawm embryonic thiab non embryonic qia hlwb?
Embryonic qia hlwb tau txais los ntawm 5- txog 12-hnub qub embryos. Conversely, tsis yog embryonic qia hlwb muaj nyob rau hauv ntau ntau nyob rau hauv placenta, umbilical cord ntshav, amniotic kua, thiab tseem ceeb tag nrho cov neeg laus lub cev los yog cov ntaub so ntswg, nrog rau cov pob txha, rog, raum, siab, pancreas, hnyuv, mis, ntsws, thiab lwm yam