Qhov sib txawv tseem ceeb ntawm astrocytes thiab oligodendrocytes yog tias astrocytes yog hom kab mob glial ntau tshaj plaws nyob rau hauv lub hauv nruab nrab paj hlwb thiab lawv tsim cov hlab hlwb teeb meem thiab tswj cov tshuaj nyob ib ncig ntawm lub neurons thaum oligodendrocytes yog cov glial hlwb uas synthesize lub hlwb. myelin sheath ncig lub axons ntawm lub hauv paus paj hlwb
Glial hlwb, tseem hu ua neuroglia, yog ib hom kev txhawb nqa hlwb hauv nruab nrab paj hlwb. Lawv yog cov hlwb uas tsis yog neural koom nrog hauv kev tswj hwm homeostasis hauv CNS thiab PNS thiab muab kev txhawb nqa thiab kev tiv thaiv rau kev ua haujlwm ntawm lub paj hlwb. Lawv tuav cov neurons nyob rau hauv qhov chaw thiab muab cov as-ham txaus thiab oxygen rau lawv. Lawv kuj insulate neurons los ntawm kev tsim cov txheej insulating nyob ib ncig ntawm lub axons, rhuav tshem cov kab mob thiab tshem tawm cov neurons tuag los ntawm lub paj hlwb. Muaj ntau hom glial hlwb li oligodendrocytes, astrocytes, ependymal hlwb, Schwann hlwb, microglia, thiab satellite hlwb. Ob leeg oligodendrocytes thiab astrocytes pib los ntawm ib hom kab mob ntawm neural progenitor cells.
Astrocytes yog dab tsi?
Astrocytes yog ntau hom glial cell hauv lub hlwb. Lawv yog cov hnub qub zoo li lub hlwb. Muaj ob hom astrocytes ua fibrous astrocytes thiab protoplasmic astrocytes. Fibrous astrocytes muaj ob txhais caj npab ntev thiab me me thaum protoplasmic astrocytes muaj cov phiaj xwm tuab nrog ntau ceg.
Daim duab 01: Astrocyte
Astrocytes ua ntau lub luag haujlwm tseem ceeb hauv lub hlwb. Lawv tsim cov ntshav hlwb thaiv thiab tswj cov tshuaj nyob ib ncig ntawm cov neurons thiab cov ntshav ntws mus rau lub hlwb. Tsis tas li ntawd, astrocytes tswj lub hlwb lub zog metabolism thiab homeostasis. Tsis tas li ntawd, astrocytes ua lub luag haujlwm tseem ceeb hauv kev muab zaub mov, dej thiab ions los ntawm lub periphery mus rau lub hlwb thiab hauv synchronizing cov haujlwm ntawm axons.
Oligodendrocytes yog dab tsi?
Oligodendrocytes yog cov hlwb glial uas tsim myelin sheaths txhawm rau txhawm rau tiv thaiv cov neuron axons ntawm lub hauv nruab nrab paj hlwb ntawm cov vertebrates siab dua. Cov hlwb no muaj nyob thoob plaws hauv CNS, hauv ob qho tib si dawb thiab grey teeb meem. Oligodendrocytes yog cov hlwb txhawb nqa tseem ceeb ntawm CNS. Lawv muaj ib tug me me cytoplasm nyob ib ncig ntawm ib puag ncig nucleus. Tsis tas li ntawd, lawv muaj ntau yam txheej txheem cytoplasmic uas tawm ntawm lub cev ntawm tes. Lawv zoo li cov pob spikey.
Daim duab 02: Oligodendrocytes
Lub hauv paus paj hlwb hauv tsev oligodendrocytes txhawm rau tsim myelin sheaths nyob ib ncig ntawm axons. Myelin sheaths insulate lub axons los tiv thaiv kev poob ntawm cov teeb liab thiab nce tus nqi ntawm cov teeb liab kis tau tus mob. Ib qho oligodendrocyte muaj peev xwm tsim tau myelin sheath ntu nyob rau hauv li 50 axons txij li cov txheej txheem cytoplasmic ntawm ib leeg oligodendrocyte tuaj yeem ncav cuag 50 axons uas nyob ib sab thiab tsim myelin sheaths. Ntxiv nrog rau kev tsim myelin sheath, oligodendrocytes zais qee yam kev loj hlob los pab kev loj hlob ntawm neuronal thiab kev loj hlob.
Dab tsi yog qhov zoo sib xws ntawm Astrocytes thiab Oligodendrocytes?
- Ob lub astrocytes thiab oligodendrocytes yog microglia hlwb nyob rau hauv nruab nrab paj hlwb.
- Lawv yog cov hlwb txhawb nqa ntawm cov neurons hauv CNS.
- Astrocytes, oligodendrocytes, thiab lwm lub hlwb pib los ntawm ib daim ntawv tiaj tus ntawm cov hlwb neuroepithelial uas yog qhov ua ntej tshaj plaws hauv CNS.
Qhov txawv ntawm Astrocytes thiab Oligodendrocytes yog dab tsi?
Astrocytes yog lub hnub qub zoo li lub hnub qub glial hlwb uas tsim cov hlab ntsha hauv hlwb, tswj cov tshuaj nyob ib puag ncig cov neurons thiab cov ntshav ntws mus rau lub hlwb. Oligodendrocytes, ntawm qhov tod tes, yog cov hlwb glial uas tsim cov myelin sheath nyob ib ncig ntawm axons. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm astrocytes thiab oligodendrocytes. Ntxiv mus, astrocytes yog cov hlwb glial tshaj plaws hauv CNS piv rau oligodendrocytes.
Tsis tas li ntawd, astrocytes yog lub hnub qub zoo li thaum oligodendrocytes zoo li cov pob spikey. Astrocytes koom nrog hauv kev tsim cov ntshav hlwb teeb meem, kev tswj cov tshuaj nyob ib ncig ntawm cov neurons, kev tswj cov ntshav ntws mus rau lub hlwb thiab kev tswj cov metabolism hauv lub hlwb. Nyob rau hauv sib piv, oligodendrocytes koom nyob rau hauv tsim ntawm ib tug tiv thaiv txheej hu ua myelin sheath nyob ib ncig ntawm lub axons. Lawv kuj muab kev ruaj ntseg thiab nqa lub zog ntawm cov qe ntshav mus rau axons. Yog li, qhov no yog qhov sib txawv ntawm astrocytes thiab oligodendrocytes.
Summary – Astrocytes vs Oligodendrocytes
Astrocytes thiab oligodendrocytes yog ob hom glial hlwb nyob rau hauv nruab nrab paj hlwb. Astrocytes yog cov kab mob glial ntau tshaj plaws nyob rau hauv nruab nrab paj hlwb. Lawv yog lub hnub qub zoo li tus, thiab lawv ua haujlwm tseem ceeb hauv cov ntshav hlwb thaiv kev kho, neuronal ciaj sia, thiab hauv kev tsim synapse, lub zog, thiab kev hloov pauv. Oligodendrocytes yog cov hlwb glial uas tsim cov myelin sheath. Myelin sheaths qhwv ib ncig ntawm lub axons kom tso cai sai sai s altatory conduction ntawm kev muaj peev xwm. Ntxiv mus, oligodendrocytes muab axonal metabolic kev txhawb nqa thiab pab txhawb rau neuroplasticity. Yog li, qhov no qhia txog qhov sib txawv ntawm astrocytes thiab oligodendrocytes.
