![Dab tsi cuam tshuam rau kev nrawm ntawm cov hlab ntsha? Dab tsi cuam tshuam rau kev nrawm ntawm cov hlab ntsha?](https://i.answers-medical.com/preview/medical-health/14115306-what-affects-speed-of-nerve-impulses-j.webp)
Video: Dab tsi cuam tshuam rau kev nrawm ntawm cov hlab ntsha?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Qhov nrawm tau cuam tshuam los ntawm 3 yam: Kub -Qhov siab dua kub , qhov ceev ceev. Sohomoeothermic (sov-ntshav) tsiaj muaj cov lus teb sai dua li poikilothermic (cov ntshav txias). Axon txoj kab uas hla - Qhov loj dua qhov loj, qhov ceev ceev.
Los ntawm qhov ntawd, dab tsi cuam tshuam rau kev nrawm ntawm cov hlab ntsha coj mus?
Lub xub ntiag ntawm myelin sheath nrog rau nce indiameter thiab kub yuav cuam tshuam rau qhov nrawm ntawm qhov muaj peev xwm ua tau. Txoj kab uas hla ntawm lub axon kuj yuav cuam tshuam qhov ceev . Raws li txoj kab uas hla ntawm axon nce, lub kev coj ua yuav ntau dua vim tias tsawg dua tam sim no (ions) yuav los ntawm axon.
Ib yam li ntawd, qhov ceev ntawm cov hlab ntsha impulse yog dab tsi? Cov ceev ntawm a paj hlwb nws txawv nrog hom paj hlwb cov tshee system xa tuaj. Qee cov cim qhia xws li cov rau cov leeg nqaij, taug kev ntawm ceev mus txog 119m/s Lub paj hlwb xws li kev mob nkeeg taug kev qeeb ntawm 0.61m/s. Kov cov cim taug kev ntawm ceev ntawm 76.2m/s
Ib yam li ntawd, nws tau nug, dab tsi ua rau kom nrawm ntawm cov hlab ntsha cuam tshuam?
Qhov tseem ceeb tshaj plaws uas nce tus nqi ntawm kev xa xov paj hlwb yog qhov muaj myelin (oligodendrocytes), uas pab tiv thaiv cov hluav taws xob muaj peev xwm hauv axon.
Puas yog cov hlab ntsha mus ncig ntawm qhov nrawm ntawm lub teeb?
Hauv tib neeg cov ntsiab lus, cov teeb liab nqa los ntawm qhov loj-inch, myelinated neurons uas txuas tus txha caj qaum mus rau cov leeg tuaj yeem taug kev ntawm ceev xws li ntawm 70-120 meters ib ob (m / s) (156-270 mais ib teev [mph]), thaum lub teeb liab taug kev raws tib txoj hauv kev nqa los ntawm txoj kab uas hla me me, tsis muaj cov fibers uas tsis sib haum
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