Video: Dab tsi ntawm Neuroglial cell hom tsim myelin sheaths hauv CNS?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Muaj ob hom neuroglia hauv lub paj hlwb peripheral (PNS): Schwann hlwb thiab satellite hlwb . Schwann hlwb muab myelination rau peripheral neurons. Ua haujlwm, tus schwann hlwb zoo ib yam li oligodendrocytes ntawm lub hauv paus paj hlwb ( CNS ).
Ntawm no, hom Neuroglial cell yog dab tsi tshaj plaws hauv CNS?
astrocytes
Qhov thib ob, 4 hom Neuroglia hauv CNS yog dab tsi? Muaj rau hom neuroglia - plaub hauv lub hauv paus paj hlwb thiab ob qho hauv PNS. Neuroglia hauv CNS suav nrog astrocytes, microglial cells, ependymal cells thiab oligodendrocytes. Hauv PNS, satellite hlwb thiab Schwann hlwb yog ob hom neuroglia.
Hauv qhov no, qhov twg ntawm cov Neuroglial cells tsim cov myelin sheath hauv lub hauv paus paj hlwb?
Glial hlwb ntawm (a) lub hauv paus paj hlwb muaj xws li oligodendrocytes, astrocytes, ependymal hlwb , thiab microglial hlwb . 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.
Hom twg ntawm cov hom glial hauv qab no tsim cov myelin sheaths uas tiv thaiv cov hlab ntsha hauv CNS?
Nyob ntawm qhov chaw, txawv glial cell hom ua myelin hauv a txawv yam. Schwann cell ua myelin nyob rau hauv peripheral paj hlwb (PNS: paj hlwb) thiab oligodendrocytes nyob rau hauv lub lub hauv paus paj hlwb ( CNS : paj hlwb thiab txha caj qaum). Hauv PNS, ib tus Schwann cell daim ntawv ib ib myelin sheath (Daim duab 1A).
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