Video: Dab tsi yog daim ntawv myelin hauv CNS?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Myelin yog tsim nyob rau hauv lub hauv nruab nrab lub paj hlwb (CNS ) los ntawm glial hlwb hu ua cov oligodendrocytes thiab hauv peripheral paj hlwb (PNS) los ntawm glial hlwb hu ua Schwann hlwb.
Hauv qhov no, dab tsi Neuroglia tsim myelin sheath hauv CNS?
Glial cells ntawm (a) lub hauv paus paj hlwb suav nrog oligodendrocytes, astrocytes, ependymal cells, thiab microglial cells. Oligodendrocytes cov tshuaj tsim cov myelin sheath ncig axons. Astrocytes muab cov as -ham rau cov neurons, tswj hwm lawv ib puag ncig sab nraud, thiab muab kev txhawb nqa yam ntxwv.
Tsis tas li, dab tsi yog myelin sheath ua los ntawm? Myelin yog txheej insulating, lossis sheath uas tsim nyob ib puag ncig qab haus huv, suav nrog cov hauv lub hlwb thiab tus txha caj qaum. Nws yog ua nce ntawm cov protein thiab fatty khoom. Qhov no myelin daim tawv nqaij tso cai rau hluav taws xob xa hluav taws xob xa mus sai thiab muaj txiaj ntsig zoo raws cov leeg hlwb. Yog myelin puas lawm, cov kev xav no qeeb.
Ib yam li ntawd, koj tuaj yeem nug, cov myelin sheath tsim hauv CNS li cas?
Myelin yog tsim los ntawm Schwann hlwb nyob rau hauv lub peripheral paj hlwb (PNS) thiab oligodendrocytes nyob rau hauv lub hauv paus paj hlwb ( CNS ). Txhua Schwann cell tsim ib leeg myelin daim tawv nqaij ib ncig ntawm axon. Myelin Nws tus kheej tsim los ntawm cov kauv qhwv ib ncig ntawm ib qho axon ntawm ib qho kev nthuav dav glial plasma daim nyias nyias, uas tom qab ntawd compacts.
Vim li cas lub hnab yas myelin tseem ceeb?
Myelin Muaj nuj nqi. Cov myelin daim tawv nqaij yog ib qho kev tiv thaiv uas nyob ib puag ncig cov fibers hu ua axons, qhov kev kwv yees ntev ntev uas nthuav tawm los ntawm lub cev tseem ceeb ntawm cov hlab ntsha hlwb lossis neuron. Lub luag haujlwm tseem ceeb ntawm myelin yog los tiv thaiv thiab tiv thaiv cov axons no thiab txhim kho lawv txoj kev xa hluav taws xob.
Pom zoo:
Koj yuav hloov daim ntawv kho mob ntawv mus rau cov ntaub ntawv kho mob hauv xov tooj cua li cas?
Hloov daim ntawv kab ntawv mus rau cov ntaub ntawv kho mob hluav taws xob Txhua tus kab mob ntawm tus neeg mob tau luam tawm rau hauv cov ntaub ntawv kho mob hluav taws xob (EMR). Ib nrab ntawm kev tshuaj xyuas kab mob ntawm tus neeg mob rau hauv EMR system. Luam theej duab txhua tus neeg mob nplooj ntawv sau rau hauv EMR system. Ntiav ib lub tuam txhab sab nraud los tshuaj xyuas tag nrho koj cov kab kos rau hauv EMR system. Tsis txhob luam cov ntaub ntawv qub rau hauv EMR system
Myelin yog dab tsi Myelination txheej txheem sib txawv hauv CNS thiab PNS?
CNS myelin yog tsim los ntawm cov hlwb tshwj xeeb hu ua oligodendrocytes. PNS myelin yog tsim los ntawm Schwann cells. Ob hom myelin yog cov tshuaj sib txawv, tab sis lawv ob leeg ua haujlwm zoo ib yam los txhawb nqa kev sib kis ntawm cov hlab ntsha tsis zoo raws lub axon
Cov lus cim dab tsi uas tshwm ntawm daim ntawv ntim cov tshuaj thiab daim ntawv txheeb xyuas kev nyab xeeb yog dab tsi?
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Dab tsi yog qhov txawv ntawm daim tawv nqaij thiab daim tawv nqaij daim ntawv xeem?
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