![Puas yog pob ntawm cov hlab ntsha nyob sab nraum lub hauv paus paj hlwb? Puas yog pob ntawm cov hlab ntsha nyob sab nraum lub hauv paus paj hlwb?](https://i.answers-medical.com/preview/medical-health/14151297-is-a-bundle-of-nerve-fibers-located-outside-the-central-nervous-system-j.webp)
Video: Puas yog pob ntawm cov hlab ntsha nyob sab nraum lub hauv paus paj hlwb?
![Video: Puas yog pob ntawm cov hlab ntsha nyob sab nraum lub hauv paus paj hlwb? Video: Puas yog pob ntawm cov hlab ntsha nyob sab nraum lub hauv paus paj hlwb?](https://i.ytimg.com/vi/RPowUTVWRBk/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Ntshai -a pob ntawm paj hlwb (axons) tuav ua ke los ntawm cov ntaub so ntswg sib txuas. Qab haus huv yog nyob sab nraum lub hauv paus paj hlwb . Cov kab mob ntawm cov hlab ntsha nyob rau hauv lub central paj hlwb hu ua TRACTS. Nerve Fiber - axon (txheej txheem ntawm a paj hlwb cell) thiab nws cov ntawv.
Ntxiv mus, dab tsi yog ib pawg ntawm cov paj hlwb hu ua?
Nyob rau hauv lub peripheral tshee qhov system a pob yog axons hu ua a paj hlwb . Hauv nruab nrab tshee system a pob yog axons hu ua ib daim ntawv. Txhua axon yog ib puag ncig los ntawm cov txheej txheem endoneurium ilv. Hoob kawm cov ntaub so ntswg sib txuas hu ua perineurium, khi cov fibers rau hauv bundles npe fascicles.
Tsis tas li ntawd, cov neurons twg nqa impulses tawm ntawm lub hauv paus paj hlwb mus rau cov leeg? Tsav tsheb neurons muaj axon ntev thiab dendrites luv thiab xa cov lus los ntawm lub hauv nruab nrab lub paj hlwb mus rau cov leeg (lossis rau qog). Interneurons tsuas yog pom nyob hauv nruab nrab lub paj hlwb uas lawv txuas cov neuron mus rau neuron.
dab tsi feem ntawm lub paj hlwb tswj cov pob txha pob txha?
Cov somatic lub paj hlwb (SNS lossis yeem yeem lub paj hlwb ) yog ib feem ntawm peripheral lub paj hlwb cuam tshuam nrog kev yeem yeem tswj ntawm lub cev txav ntawm cov leeg pob txha . Cov somatic lub paj hlwb muaj afferent paj hlwb los yog lub siab paj hlwb , thiab efferent paj hlwb los yog lub cev muaj zog paj hlwb.
Cov qauv twg yuav muaj cov paj hlwb hnov?
Tus txha nqaj qaum ganglia los yog hauv paus hauv paus ganglia muaj lub cev ntawm tes kev xav neurons nkag mus rau qaum ntawm thaj av ntawd. paj hlwb - ib pawg ntawm fibers (axons) sab nraum CNS. Tus txha nqaj qaum qab haus huv muaj cov fibers ntawm kev xav thiab motor neurons.
Pom zoo:
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Muaj plaub hom neuroglia pom nyob hauv nruab nrab lub paj hlwb: Astrocytes - tswj cov ntshav lub hlwb teeb meem thiab khaws cov tshuaj ib puag ncig los ntawm kev siv cov ions rov qab thiab cov tshuaj xa xov mus rau lub cev. Oligodendrocytes - myelinate axons nyob rau hauv lub hauv nruab nrab lub paj hlwb thiab muab tag nrho cov txheej txheem txheej txheem
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Lub paj hlwb muaj ob ntu tseem ceeb: Lub hauv paus paj hlwb yog tsim los ntawm lub hlwb thiab tus txha caj qaum. Lub paj hlwb peripheral yog tsim los ntawm cov hlab ntsha uas tawm ntawm tus txha caj qaum thiab txuas mus rau txhua qhov ntawm lub cev
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Lub ganglion yog ib qho kev sau ntawm cov paj hlwb lub cev sab nraud ntawm CNS. Neuroglia yog cov hlwb txhawb nqa hauv nruab nrab paj hlwb Qee zaum, neuroglia hu ua glial hlwb lossis glia. Cov xov tooj cua ntawm lub hnub qub tau pom nyob hauv ganglia ntawm lub paj hlwb sab hauv