Video: Puas muaj teeb meem dawb muaj cov rog sib xws?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Tseeb los yog False: Cov teeb meem dawb muaj cov rog sib xws . muaj tseeb; yam dawb Feem ntau muaj myelinated axons. Myelination yog tsim los ntawm daim nyias nyias ntawm neuroglial cell qhwv ntau zaus nruj nreem ib ncig ntawm lub axon. Cov roj ntau ntau muab yam dawb nws yog tus yam ntxwv ci dawb tsos.
Ib yam li ntawd, lub paj hlwb puas yog lub cev uas tsis muaj kab noj hniav?
Cov muaj pes tsawg leeg ntawm cov teeb meem grey muaj xws li neuron cell lub cev. Cov teeb meem dawb muaj cov rog sib xws. Cov lub hlwb yog a cev nqaij daim tawv uas tsis muaj kab noj hniav . Tag nrho peb cheeb tsam ntawm lub lub hlwb qia tuaj yeem pom ntawm qhov chaw ventral ntawm lub hlwb.
Ib tug kuj yuav nug, dab tsi yog cov teeb meem dawb ua los ntawm? Teeb meem dawb yog cov leeg ntshav dawb ntawm lub hauv nruab nrab lub paj hlwb uas feem ntau yog tsim los ntawm cov hlab ntsha myelinated (lossis axons). Lub hauv paus paj hlwb yog lub hlwb thiab tus txha caj qaum. Thiab grey teeb meem yog cov hlab ntshav liab ntawm lub hauv nruab nrab lub paj hlwb feem ntau yog tsim los ntawm cov leeg hlwb lub cev thiab dendrites.
Hais txog qhov no, lub luag haujlwm ntawm cov teeb meem dawb yog dab tsi?
Teeb meem dawb. Cov teeb meem dawb yog tsim los ntawm cov pob khoom, uas txuas ntau yam teeb meem grey (thaj chaw ntawm cov hlab ntsha ntawm tes lub cev) ntawm lub hlwb rau ib leeg, thiab nqa cov hlab ntsha impulses ntawm neurons.
Dab tsi yog qhov teeb meem dawb nyob rau hauv tus txha caj qaum?
Qhov teeb meem dawb yog ib qho ntawm ob yam ntawm lub hauv nruab nrab paj hlwb thiab muaj feem ntau ntawm glial hlwb thiab myelinated axons. Cov yam 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.
Pom zoo:
Kev rog rog yog teeb meem rau pej xeem li cas?
Cov ntaub ntawv tau muab qhia tias kev rog rog ua rau muaj ntau yam teeb meem suav nrog hom 2 mob ntshav qab zib mellitus, ntshav siab, kab mob hauv lub plawv, mob hlab ntsha tawg, mob raum, teeb meem ua pa, pw tsaug zog apnea, mob pob txha, mob qog noj ntshav, teeb meem kev puas siab puas ntsws (xws li kev nyuaj siab hauv tsev kho mob), ntxhov siab vim, thiab thaum kawg
Dab tsi yog qhov sib txawv ntawm cov ntaub so ntswg sib txuas tsis tu ncua thiab cov ntaub so ntswg sib txuas tsis sib xws?
Cov ntaub so ntswg sib txuas tsis sib thooj muaj cov fibers uas tsis tau sib dhos ua ke zoo ib yam li cov ntaub so ntswg sib txuas ib ntus. Cov ntaub so ntswg sib txuas tsis sib thooj muaj feem ntau ntawm cov fibers collagen. Nws muaj cov khoom hauv av tsawg dua li cov ntaub so ntswg sib txuas
Puas yog qhov txo qis ntshav ntws mus rau lub plawv tshwm sim los ntawm kev sib sau ntawm cov rog rog hauv cov hlab ntsha?
Atherosclerosis (tej zaum hu ua 'hardening' los yog 'clogging' ntawm cov hlab ntsha) yog tsim cov roj cholesterol thiab fatty deposits (hu ua plaques) nyob rau sab hauv phab ntsa ntawm cov hlab ntsha. Cov quav hniav no tuaj yeem txwv cov ntshav ntws mus rau cov leeg nqaij hauv lub cev los ntawm kev txhaws cov hlab ntshav lossis ua rau lub suab nrov txawv txav thiab ua haujlwm
Qhov sib txawv ntawm kev noj qab haus huv tsis sib xws thiab kev noj qab haus huv tsis sib xws yog dab tsi?
Kev Noj Qab Haus Huv Tsis Zoo. Lawv tsuas yog qhov sib txawv ntawm qhov muaj tus kab mob, cov txiaj ntsig kev noj qab haus huv, lossis nkag mus rau kev saib xyuas kev noj qab haus huv ntawm pab pawg neeg. Kev noj qab haus huv tsis ncaj ncees, ntawm qhov tod tes, yog qhov sib txawv ntawm kev noj qab haus huv uas tsis yog qhov tsim nyog thiab zam tau tab sis, ntxiv rau, suav tias tsis ncaj ncees thiab tsis ncaj ncees
Dab tsi yog qhov txawv ntawm grey teeb meem thiab cov teeb meem dawb?
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