Myelin yog txheej txheej insulating, los yog sheath uas tsim ncig cov hlab ntsha, suav nrog cov hauv hlwb thiab qaum qaum. Nws yog tsim los ntawm cov protein thiab fatty khoom. Qhov no myelin sheath tso cai rau hluav taws xob impulses kis tau sai thiab zoo raws cov paj hlwb.
myelin nyob qhov twg ntawm lub neuron?
Myelin yog cov khoom muaj roj uas qhwv ib ncig ntawm cov paj hlwb. Hauv daim duab no, myelin tuaj yeem pom ntawm kawg ntawm cov hlab ntsha. Qhov khoob hauv nruab nrab ntawm cov fibers yog hu ua nodes, uas pab xa hluav taws xob teeb liab hauv cov neurons.
Tus qauv thiab kev ua haujlwm ntawm myelin sheath yog dab tsi?
Lub Myelin Sheath ntawm cov neuron muaj cov roj uas muaj roj uas insulate axon los ntawm hluav taws xob ua haujlwm. Qhov rwb thaiv tsev no ua kom nce tus nqi ntawm kev sib kis ntawm cov teeb liab. Qhov sib txawv muaj nyob nruab nrab ntawm txhua myelin sheath cell raws axon.
Yuav pom dab tsi hauv cov ntaub qhwv myelin?
Myelin muaj li ntawm 40% dej thiab cov huab cua qhuav muaj li 80% lipids thiab 20% protein. Feem ntau lipid muaj pes tsawg leeg ntawm myelin muab cov xim dawb, yog li siv rau lub hlwb "dawb teeb meem." Lub ntsiab lipid pom nyob rau hauv myelin yog a glycolipid hu ua galactocerebroside
Puas yog myelin sheath muaj nyob rau hauv dendrites?
Lwm dendrites (dendrites 1-4) kuj muaj qhov tawg ntawm myelin sheaths hauv lawv cov cytoplasm, txawm hais tias nyob rau hauv cov xwm txheej no cov myelinated axons tsis pom tseeb.
