Video: Dab tsi yog txheej txheej epidermal nrog qia hlwb?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Epidermal qia hlwb yog lub luag haujlwm rau kev tsim kho tshiab txhua hnub ntawm qhov sib txawv txheej ntawm epidermis . Cov no qia hlwb muaj nyob rau hauv lub hauv paus txheej ntawm epidermis . Cov plaub hau follicle qia hlwb xyuas kom ruaj khov txuas ntxiv ntawm cov hauv paus plaub hau.
Tom qab ntawd, txhua txheej ntawm daim tawv nqaij ua dab tsi?
Cov epidermis yog sab nrauv txheej ntawm peb tawv nqaij . Nws lub hom phiaj tseem ceeb yog kev tiv thaiv Lub stratum spinosum, uas pab kev sib koom tes tawv nqaij cov hlwb ua ke, thiab stratum granulosum, uas tsim cov khoom siv waxy uas pab ua kom tsis muaj dej. daim tawv nqaij txheej , yog nyob nruab nrab ntawm stratum corneum thiab stratum basale.
Ib sab saum toj no, cov kab mob epidermal yog dab tsi? Epidermal hlwb suav nrog ntau hom hlwb uas ua lub daim tawv nqaij ntawm cov nroj tsuag. Cov no hlwb tau nyob ze ua ke kom tiv thaiv kev poob dej raws li kev tiv thaiv txheej txheem. Cov ntawm tes txheej npog cov noob, qia, hauv paus thiab nplooj ntawm tsob ntoo.
Tsis tas li ntawd, hauv txheej txheej txheej txheej twg yog tyrosinase ua haujlwm?
3. Ib qho ua rau tib neeg albinism yog qhov tsis xws luag hauv cov protein tyrosinase, ib qho enzyme uas pab tswj kev tsim cov melanin. Nyob rau hauv dab tsi epidermal txheej yog tyrosinase ua hauj lwm? (Tyrosinase yog ib qho enzyme uas tsim cov melanin ntawm melanocytes pom ntawm cov cell ntawm stratum basale .)
Hom qia hlwb twg yog cov tawv nqaij qia hlwb?
Daim tawv nqaij qia hlwb cov neeg laus muaj ntau lub zog qia hlwb tam sim no hauv tus neeg laus tawv nqaij , uas tuaj yeem rov ua tus kheej thiab sib txawv rau qhov sib txawv ntawm tes lineages of cov tawv nqaij . Cov tawv nqaij qia hlwb yog nquag thaum tawv nqaij rov ua dua tshiab, uas tshwm sim thoob plaws lub neej, thiab hauv tawv nqaij kho tom qab raug mob.
Pom zoo:
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 qhov kev sib cav nrog kev tshawb fawb qia cell?
Stem cell controversy. Lub qia cell tsis sib haum xeeb yog kev xav txog kev coj ncaj ncees ntawm kev tshawb fawb txog kev txhim kho thiab kev siv tib neeg embryos. Feem ntau, qhov kev sib cav no tsom mus rau embryonic qia hlwb. Tsis yog txhua qhov kev tshawb fawb qia cell cuam tshuam nrog tib neeg lub cev
Dab tsi hauv nruab nrog cev txuas nrog rau txoj hlab ntaws hauv tus menyuam npua Dab tsi nws sau nrog?
Pom qhov umbilical vein txuas rau txoj hlab ntaws nrog lub siab. Txiav cov leeg no kom koj tuaj yeem tso txoj hlab ntaws rov qab nruab nrab ntawm tus npua lub qab taw. Mob siab-daim siab yog cov kabmob loj dub/xim av ntau lub lobed nyob rau sab saum toj ntawm kab noj hniav
Dab tsi yog ob hom qia hlwb?
Muaj peb hom qia hlwb: cov neeg laus qia hlwb, embryonic (los yog pluripotent) qia hlwb, thiab induced pluripotent qia hlwb (iPSCs)
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