Video: Dab tsi yog qhov piv txwv ntawm daim npog myelin?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
myelin - sheath Kab lus Piv txwv
Schwann cell muaj qhov dav cytoplasm uas tso cai rau nws los qhwv ib qho myelin hnab nyob ib ncig ntawm lub paj hlwb. Cov hlab ntsha tuaj yeem muab piv rau cov xaim hluav taws xob, nyob rau hauv uas cov hlau ib feem yog lub axon ntawm cov hlab ntsha thiab cov rwb thaiv tsev nyob ib puag ncig nws. myelin daim tawv nqaij.
Tsis tas li, lub ntsiab lus ntawm myelin sheath yog dab tsi?
: lub insulating npog uas nyob ib puag ncig ib qho axon nrog ntau txheej kauv ntawm myelin , uas yog qhov tsis sib xws ntawm cov nodes ntawm Ranvier, thiab qhov ntawd ua rau kom nrawm dua uas lub paj hlwb tuaj yeem taug kev nrog lub axon. - tseem hu ua medullary sheath.
Tom qab ntawd, lo lus nug yog, txoj haujlwm ntawm myelin sheath yog dab tsi? Muaj nuj nqi ntawm Myelin Sheath Cov myelin daim tawv nqaij muaj tus lej muaj nuj nqi hauv lub paj hlwb. Lub ntsiab kev ua haujlwm suav nrog tiv thaiv lub qab haus huv los ntawm lwm qhov kev siv hluav taws xob, thiab ua kom nrawm dua lub sijhawm nws yuav siv rau cov hlab ntsha mus hla lub axon.
Hauv qhov no, dab tsi ua rau myelin sheath?
Myelin yog ua los ntawm ob hom kev txhawb nqa ntawm tes. Hauv nruab nrab lub paj hlwb (CNS) - lub hlwb thiab tus txha nqaj qaum - cov hlwb hu ua oligodendrocytes qhwv lawv cov ceg zoo li txuas ntxiv ib puag ncig ntawm axons los tsim myelin hnab . Hauv cov hlab ntsha sab nraud ntawm tus txha caj qaum, Schwann cells tsim tawm myelin.
Myelin sheath zoo li cas?
Myelin thiab Koj Lub Siab myelin hnab qhwv nyob ib ncig ntawm cov fibers uas yog ib feem xov zoo li ib feem ntawm cov leeg hlwb. Cov sheath tiv thaiv cov fibers, hu ua axons, ntau heev nyiam rwb thaiv tsev nyob ib ncig ntawm cov xaim hluav taws xob. Thaum lub myelin daim tawv nqaij yog noj qab nyob zoo, cov hlab ntsha tau xa thiab tau txais sai.
Pom zoo:
Qhov piv txwv ntawm qhov xwm txheej tsis nyab xeeb yog dab tsi?
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Dab tsi yog qhov zoo ntawm kev siv lub npog ntsej muag oxygen piv rau lub qhov ntswg cannula?
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