![Dab tsi yog kab ntawm cov teeb meem dawb? Dab tsi yog kab ntawm cov teeb meem dawb?](https://i.answers-medical.com/preview/medical-health/13957018-what-are-the-columns-of-white-matter-j.webp)
Video: Dab tsi yog kab ntawm cov teeb meem dawb?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov grey teeb meem ua rau sab hauv ntawm tus txha caj qaum; nws yog surrounded los ntawm tag nrho cov sab yam dawb . Cov yam dawb yog subdivided rau hauv dorsal (los yog posterior), lateral, thiab ventral (los yog anterior) kab . Txhua tus ntawm cov no kab muaj cov pob ntawm axons cuam tshuam nrog cov haujlwm tshwj xeeb.
Tom qab ntawd, dab tsi yog txoj haujlwm ntawm kab dawb?
Dawb Kab Ascending tracts ntawm lub paj hlwb fibers nyob rau hauv cov no kab nqa cov ntaub ntawv nkag siab mus rau lub hlwb, qhov nqes nqes nqes dej nqa cov lus txib los ntawm lub hlwb.
Ib sab saum toj no, qhov teeb meem dawb ntawm tus txha nqaj qaum muaj dab tsi? Dawb teeb meem yog ib qho ntawm ob lub ntsiab lus ntawm lub hauv nruab nrab lub paj hlwb thiab feem ntau yog cov hlwb glial thiab myelinated axons. Cov teeb meem dawb yog dawb vim yog cov rog rog (myelin) uas nyob ib puag ncig paj hlwb fibers. Myelin ua raws li hluav taws xob rwb thaiv tsev.
Ua kom pom qhov no, peb kab ntawm cov teeb meem dawb pom hauv tus txha nqaj qaum yog dab tsi?
Cov yam dawb ntawm tus txha nqaj qaum tau muab faib ua dorsal (lossis posterior), ib sab, thiab ventral (lossis sab xub ntiag) kab , txhua tus uas muaj cov kab ntawv axon cuam tshuam nrog kev ua haujlwm tshwj xeeb. Lub dorsal kab nqa cov ntaub ntawv nkag siab los ntawm somatic mechanoreceptors (Daim duab 1.11B).
Cov kab mob ntawm tus txha caj qaum yog dab tsi?
Cov tus txha nqaj qaum yog ua los ntawm 33 cov pob txha nyob rau sab saum toj ntawm ib leeg hu ua vertebrae.
Sab nraub qaum yog ua los ntawm 4 thaj tsam sib txawv:
- cheeb tsam ncauj tsev menyuam (caj dab)
- thaj tsam thoracic (hauv siab)
- thaj tsam lumbar (sab nraub qaum) &
- lub sacral cheeb tsam (pelvic)
Pom zoo:
Dab tsi yog qhov sib txawv tseem ceeb ntawm teeb meem tsom mus rau kev daws teeb meem thiab kev xav tsom mus rau kev daws?
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Thaum kev ntxhov siab pom tau tias yog tswj tau, teeb meem tsom mus rau cov tswv yim daws teeb meem cuam tshuam nrog cov tsos mob ntawm kev puas siab puas ntsws, thaum nyob hauv qhov xwm txheej tsis txaus ntseeg, kev xav-tsom mus rau kev daws teeb meem cuam tshuam nrog cov tsos mob tsawg dua
Dab tsi yog cov teeb meem nthuav tawm los ntawm kev loj hlob sai ntawm cov pej xeem?
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Kev loj hlob sai ntawm cov pej xeem muaj kev cuam tshuam loj nyiaj txiag. Nws txhawb kev tsis ncaj ncees hauv kev faib nyiaj tau los; nws txwv tus nqi ntawm kev loj hlob ntawm tag nrho cov khoom lag luam hauv lub tebchaws los ntawm kev tuav cov theem ntawm kev txuag nyiaj thiab peev peev; nws exerts siab rau kev ua liaj ua teb ntau lawm thiab av; thiab nws tsim teeb meem nyiaj poob haujlwm
Dab tsi yog qhov teeb meem ntawm daim tawv nqaij uas tshwm sim los ntawm kev mob ntev ntawm cov qog sebaceous tshwm sim los ntawm cov khoom zais cia?
![Dab tsi yog qhov teeb meem ntawm daim tawv nqaij uas tshwm sim los ntawm kev mob ntev ntawm cov qog sebaceous tshwm sim los ntawm cov khoom zais cia? Dab tsi yog qhov teeb meem ntawm daim tawv nqaij uas tshwm sim los ntawm kev mob ntev ntawm cov qog sebaceous tshwm sim los ntawm cov khoom zais cia?](https://i.answers-medical.com/preview/medical-health/14002407-what-is-a-skin-disorder-characterized-by-chronic-inflammation-of-the-sebaceous-glands-caused-from-retained-secretions-j.webp)
AKA pob txuv vulgaris- Cov teeb meem ntawm daim tawv nqaij ua rau mob ntev ntawm cov qog sebaceous los ntawm khaws cia tso zis thiab Propionbacterium acnes, lub sijhawm tshawb fawb rau cov kab mob pob txuv. Qhov mob ntawm daim tawv nqaij qhuav, tawv nqaij vim tsis muaj lossis tsis muaj sebum uas tshwm sim los ntawm cov laus thiab los ntawm qhov txias
Cov teeb meem ntawm cov kab mob leukemia yog dab tsi?
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Cov qog ntshav lymphocytic mob ntev yuav ua rau muaj teeb meem xws li: Kev kis mob ntau zaus. Cov neeg uas muaj tus kab mob lymphocytic leukemia ntev yuav muaj kev kis kab mob ntau zaus. Hloov mus rau hom mob qog noj ntshav ntau dua. Muaj kev pheej hmoo ntawm lwm cov qog nqaij hlav. Teeb meem tiv thaiv kab mob
Dab tsi yog qhov txawv ntawm grey teeb meem thiab cov teeb meem dawb?
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CNS muaj ob hom ntaub so ntswg: grey teeb meem thiab dawb teeb meem, Grey teeb meem, uas muaj ib tug pinkish-grey xim nyob rau hauv lub hlwb nyob, muaj cov cell lub cev, dendrites thiab axon terminals ntawm neurons, yog li nws yog qhov twg tag nrho cov synapses. Qhov teeb meem dawb yog ua los ntawm axons txuas sib txawv ntawm qhov teeb meem grey rau ib leeg