![CNS BBC Bitesize yog dab tsi? CNS BBC Bitesize yog dab tsi?](https://i.answers-medical.com/preview/medical-health/13947989-what-is-cns-bbc-bitesize-j.webp)
Video: CNS BBC Bitesize yog dab tsi?
![Video: CNS BBC Bitesize yog dab tsi? Video: CNS BBC Bitesize yog dab tsi?](https://i.ytimg.com/vi/MTH40XZbnjs/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov central paj hlwb ( CNS ) yog tsim los ntawm tag nrho cov neurons uas ua rau lub hlwb thiab tus txha caj qaum. Cov CNS tau txais hluav taws xob los ntawm kev hnov lub paj hlwb txuas nrog lub cev. Txhawm rau tswj xyuas lub cev cov lus teb. Cov CNS xa cov hluav taws xob xa hluav taws xob, nrog rau lub cev muaj zog neurons, mus rau cov qog thiab cov leeg.
Xav txog qhov no, lub hauv paus paj hlwb GCSE yog dab tsi?
Cov lub paj hlwb . Lub paj hlwb thiab tus txha caj qaum ua rau lub hauv paus paj hlwb ( CNS ). Cov CNS tswj thiab tswj cov lus teb ntawm cov txais thiab cov ua haujlwm. A paj hlwb cell/neurone nqa cov ntaub ntawv hauv daim ntawv ntawm paj hlwb impulses los ntawm tus receptor mus rau tus coordinator.
Tsis tas li ntawd, CNS hloov kho li cas rau nws txoj haujlwm? Receptors thiab effectors txuas nrog rau lub hauv paus paj hlwb los ntawm neurones. Ib tug neurone muaj nuj nqi yog xa cov hluav taws xob cuam tshuam thoob plaws lub paj hlwb. Neurone yog yoog raws rau qhov no muaj nuj nqi hauv cov hauv qab no: Lub cev ntawm tes muaj cytoplasm thiab nucleus (qhov chaw tswj hwm ntawm tes).
Ib yam nkaus, CNS system yog dab tsi?
Cov lub hauv paus paj hlwb ( CNS ) tswj feem ntau ntawm lub cev thiab lub siab. Nws muaj ob ntu: lub hlwb thiab qaum qaum. Lub paj hlwb yog qhov chaw ntawm peb txoj kev xav, tus txhais lus ntawm peb ib puag ncig sab nraud, thiab keeb kwm ntawm kev tswj hwm lub cev txav mus los.
Dab tsi yog qhov hnov qab neuron BBC Bitesize?
Lub paj hlwb xa hluav taws xob impulses mus rau relay neuron , uas yog nyob rau hauv tus txha caj qaum ntawm CNS. Relay cov neurons txuas sensory neurons rau lub cav cov neurons . Tsav neuron xa cov hluav taws xob mus rau tus neeg ua haujlwm. Effector tsim cov lus teb (cov ntawv cog lus nqaij txav mus deb).
Pom zoo:
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Lub paj hlwb suav nrog lub hlwb, tus txha caj qaum, lub cev hnov qab, thiab tag nrho cov hlab ntsha uas txuas cov kabmob no nrog rau tag nrho lub cev. Ua ke, cov kabmob no yog lub luag haujlwm rau kev tswj hwm lub cev thiab kev sib txuas lus ntawm nws qhov chaw
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Lub hauv paus paj hlwb (CNS) tswj hwm kev ua haujlwm ntau ntawm lub cev thiab lub siab. Nws muaj ob ntu: lub hlwb thiab qaum qaum. Lub paj hlwb yog qhov chaw ntawm peb txoj kev xav, tus neeg txhais lus ntawm peb ib puag ncig sab nraud, thiab keeb kwm ntawm kev tswj hwm lub cev txav mus los
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Muaj rau hom neuroglia -plaub nyob hauv nruab nrab lub 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
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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
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Piv txwv ntawm plaub hom glial hlwb pom nyob rau hauv lub hauv paus paj hlwb: ependymal hlwb (lub teeb liab), astrocytes (ntsuab), microglial hlwb (dub liab), thiab oligodendrocytes (lub teeb xiav)