Video: Dab tsi yog A beta fibers?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
A-alpha paj fibers nqa cov ntaub ntawv ntsig txog kev tsim khoom (kev nkag siab ntawm cov leeg). A- beta paj hlwb fibers nqa cov ntaub ntawv ntsig txog kov. A-delta paj fibers nqa cov ntaub ntawv ntsig txog qhov mob thiab qhov kub thiab txias.
Hais txog qhov no, A thiab C fibers yog dab tsi?
Cov C pab pawg fibers yog cov tsis tau sib cais thiab muaj lub taub me me thiab tsis muaj kev sib kis tau zoo, qhov uas Pawg A thiab B yog myelinated. Pawg C fiber ntau suav nrog postganglionic fibers nyob rau hauv autonomic nervous system (ANS), thiab paj hlwb fibers hauv qab dorsal keeb kwm (IV fiber ntau ). Puas lossis raug mob rau cov hlab ntsha fibers ua rau mob neuropathic.
dab tsi yog peb hom ntawm cov hlab ntsha? Lub paj hlwb yog classed rau hauv peb hom - Pawg A. cov paj hlwb pab pawg neeg B. cov paj hlwb , thiab pab pawg C. cov paj hlwb . Pawg A thiab B yog myelinated, thiab pab pawg C tsis tau sib cais. Cov pab pawg no suav nrog ob qho kev nkag siab fibers thiab lub cev muaj zog fibers.
Ntawm no, dab tsi yog delta fibers?
Cov A. delta fibers yog qhov loj dua thiab ua tau nrawm tshaj plaws ntawm ob hom, vim tias lawv cov myelin nyias nyias npog, thiab, yog li ntawd, lawv cuam tshuam nrog qhov ntse, ua kom zoo nyob hauv qhov chaw uas tshwm sim thawj zaug. A delta fibers tau qhib los ntawm kev siv tshuab thiab cua sov.
Dab tsi yog ob hom kev mob plab?
Txhua ntawm cov leeg txha nraub qaum tawm los ntawm tus txha nraub qaum los ntawm qhov chaw nruab nrab ntawm ob lub vertebrae muaj ob hom ntawm cov leeg: cov leeg nqaij, uas los ntawm lub hauv paus dorsal ntawm paj hlwb , thiab lub cev muaj zog fibers, uas los ntawm nws cov hauv paus hniav.
Pom zoo:
Dab tsi yog spindle fibers?
Spindle fibers yog filaments uas tsim cov mitotic spindle hauv kev faib cell, piv txwv li mitosis thiab meiosis. Lawv feem ntau koom nrog kev txav chaw thiab cais cov chromosomes thaum lub sijhawm faib nuclear. Ua ke, lawv tsim cov qauv ntxaiv, uas yog qhov dav tshaj plaws hauv nruab nrab ces taper ntawm ob qho kawg
Dab tsi yog qhov ua haujlwm ntawm spindle Fibers?
Spindle fibers tsim cov qauv protein uas faib cov khoom siv hauv lub cev. Cov ntxaiv yog qhov tsim nyog los sib faib cov chromosomes hauv niam txiv rau hauv ob tus ntxhais lub cev thaum ob hom nucleardivision: mitosis thiab meiosis. Thaum lub sij hawm mitosis, spindle fibers yog hu ua mitotic spindle
Dab tsi yog vasomotor fibers?
: ntawm, cuam tshuam nrog, cuam tshuam, lossis ua rau cov hlab ntsha lossis cov chaw (zoo li hauv medulla thiab tus txha nqaj qaum) los ntawm qhov uas lawv tshwm sim uas muab cov leeg nqaij ntawm cov phab ntsa ntawm cov hlab ntshav, suav nrog kev mob siab rau vasoconstrictors thiab parasympathetic vasodilators, thiab los ntawm lawv cuam tshuam rau vascular txoj cai tswj tus nqi ntawm
Dab tsi yog qhov txawv ntawm somatic afferent fibers thiab visceral afferent fibers?
Somatic efferent neurons yog lub cev muaj zog neurons uas ua rau muaj kev cuam tshuam los ntawm tus txha caj qaum mus rau cov leeg pob txha. Visceral afferent neurons yog cov neurons hnov qab uas ua rau impulses pib hauv receptors hauv cov leeg nqaij & cov leeg mob
Hom A fibers yog dab tsi?
Hom A fibers: Lawv yog myelinated. Lawv muaj txoj kab uas hla 1.5-20 micron. Lawv ceev ntawm conduction yog 4-120 m / sec, uas qhia tau hais tias lawv muaj ib tug heev ceev conduction ntawm impulse. Piv txwv ntawm hom A fibers yog skeletomotor fibers, fusimotor fibers thiab afferent fibers rau daim tawv nqaij