Video: Dab tsi yog epidermal melanin unit?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov epidermal melanin chav tsev (EMU) qhia txog kev sib raug zoo ntawm cov melanocyte thiab pas dej ua ke ntawm keratinocytes. Lawv kuj zoo li cuam tshuam rau biosynthesis ntawm melanin thiab melanosomes thaum lub cev hloov pauv.
Ib yam nkaus, tib neeg nug, puas yog melanin hauv daim tawv nqaij?
Cov melanin nyob rau hauv daim tawv nqaij yog tsim los ntawm melanocytes, uas muaj nyob hauv cov txheej txheej hauv paus ntawm daim tawv nqaij . Ob leeg pheomelanin thiab eumelanin tau pom hauv tib neeg daim tawv nqaij thiab plaub hau, tab sis eumelanin yog qhov muaj ntau tshaj melanin hauv tib neeg, nrog rau daim ntawv feem ntau yuav ua tsis tau zoo ntawm albinism.
melanin khaws cia nyob qhov twg? Melanin yog khaws cia hauv cytoplasmic organelles hauv melanocytes, hu ua melanosomes.
Ua qhov no hauv kev txiav txim siab, melanin thauj mus los li cas?
Kev hloov xim: tsis tas yuav yog ib qho Txawm li cas los xij, cov xim uas pom hauv daim tawv nqaij feem ntau yog nyob hauv keratinocytes, cov neeg tau txais cov cell rau melanin . Kev hloov cov xim tshwm sim hauv daim tawv nqaij melanin cov koog uas melanocytes txuas ntxiv dendrites ntev uas hu mus txog 40 keratinocytes.
Vim li cas melanocytes tsis ua melanin?
Vitiligo tshwm sim thaum cov xim- tsim tawm hlwb ( melanocytes ) tuag los yog tsum tsis ua melanin - cov xim uas muab rau koj cov tawv nqaij, plaub hau thiab qhov muag xim. Cov thaj ua rau thaj ntawm cov tawv nqaij ua kom sib dua lossis dawb. Cov kws kho mob tsis paub yog vim li cas cov cell tsis ua lossis tuag.
Pom zoo:
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Dentogingival unit (DGU) tau piav qhia tias yog chav ua haujlwm uas muaj cov epithelial txuas thiab cov ntaub so ntswg sib txuas ntawm cov gingiva - ob qho uas them taus kev tiv thaiv kab mob (1)
Melanin yog dab tsi thiab nws txoj haujlwm yog dab tsi?
Melanin yog lub npe ntawm cov xim xim uas txiav txim siab xim dav ntawm daim tawv nqaij thiab plaub hau hauv tib neeg. Cov ntaub ntawv ntawm melanin yog lub luag haujlwm rau xim thoob plaws ntiaj teb tsiaj; Piv txwv li, tis xim hauv cov noog yog tsim los ntawm melanin
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Lub luag haujlwm ntawm melanin yog dab tsi?
Melanin yog xim uas ua rau tawv nqaij. Qhov no melanin yog tsim los ntawm lub npe hu ua melanocytes hauv daim tawv nqaij. Melanin yog lub cev tus kheej txoj kev los tiv thaiv daim tawv nqaij tiv thaiv tshav ntuj. Cov txheej txheem ua tau zoo nqus tau UV-lub teeb thiab ua kom tsis muaj zog ua rau cov molecules (radicals) tsim los ntawm kev raug tshav ntuj