Cov txheej txheem:
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
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 ua fibers thiab afferent fibers rau cov tawv nqaij.
Tsis tas li ntawd, A thiab C fibers yog dab tsi?
Cov C pab pawg fibers yog cov uas tsis tau sib cais thiab muaj txoj kab uas hla me me thiab tsis muaj kev sib kis tau zoo, qhov uas Pawg A thiab B yog myelinated. Pab pawg C fibers suav nrog postganglionic fibers nyob rau hauv lub autonomic paj hlwb (ANS), thiab paj hlwb fibers hauv paus dorsal (IV fiber ntau ). Puas lossis raug mob rau cov hlab ntsha fibers ua rau mob neuropathic.
Qhov thib ob, plaub hom kev ua haujlwm ntawm paj hlwb yog dab tsi?), beta (β), gamma (?), thiab delta (δ). Cov kev faib no muaj ntau qhov sib txawv ntawm myelination thiab axon tuab thiab yog li ntawd xa cov cim ntawm qhov nrawm sib txawv. Cov kab loj dua axons thiab ntau dua myelin rwb thaiv tsev ua rau kom cov teeb liab tawm sai dua.
Ib sab saum toj no, peb hom paj hlwb yog dab tsi?
Lub paj hlwb yog classed rau hauv peb hom – group A paj hlwb pab pawg neeg B. cov paj hlwb , thiab pab pawg C. 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.
Dab tsi yog Alpha fibers?
A- alpha fibers yog cov thawj receptors ntawm cov leeg spindle thiab golgi leeg nqaij. Ib-beta fibers ua raws li kev txais tos thib ob ntawm cov leeg spindle thiab pab txhawb rau cov tawv nqaij mechanoreceptors. Ib-delta fibers yog cov paj hlwb dawb uas ua rau mob stimuli ntsig txog lub siab thiab kub.
Pom zoo:
Lub hom phiaj ntawm cov roj raus dej uas siv nrog 100x lub hom phiaj xeem ntawv yog dab tsi?
Hauv lub tshuab tsom me me, kev tso roj yog txheej txheem siv txhawm rau txhawm rau daws qhov teeb meem ntawm lub tsom iav. Qhov no yog ua tiav los ntawm kev raus ob lub hom phiaj tsom iav thiab cov hnoos qeev hauv cov roj pob tshab ntawm qhov ntsuas siab refractive, yog li ua kom cov zauv zauv ntawm lub hom phiaj tsom iav
Dab tsi yog OSHA Nws lub hom phiaj yog dab tsi?
OSHA Lub Hom Phiaj Nrog Txoj Cai Kev Nyab Xeeb Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv xyoo 1970, Congress tau tsim Txoj Haujlwm Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv (OSHA) txhawm rau kom muaj kev nyab xeeb thiab noj qab haus huv ua haujlwm rau cov txiv neej thiab poj niam ua haujlwm los ntawm kev teeb tsa thiab ua raws cov qauv thiab los ntawm kev qhia, nthuav tawm, kev kawm thiab kev pab
Dab tsi yog hom cytokines txhais hom & Muaj nuj nqi?
Cytokines yog ib pawg ntawm cov protein uas zais los ntawm cov cell ntawm lub cev tiv thaiv kab mob uas ua cov tshuaj xa xov. Cytokines tso tawm los ntawm ib lub cell cuam tshuam rau kev ua ntawm lwm lub cell los ntawm kev khi rau cov neeg txais khoom ntawm lawv qhov chaw. Los ntawm cov txheej txheem no, cytokines pab tswj kev tiv thaiv kab mob
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
Dab tsi yog 3 hom hlwb pob txha thiab lawv lub luag haujlwm yog dab tsi?
Cov pob txha tau tsim los ntawm peb hom cell hom: Osteoblasts, Osteocytes thiab Osteoclasts. Osteoblasts: Osteoblasts yog cov pob txha tsim cov hlwb uas nqis los ntawm cov hlwb osteoprogenitor. Osteocytes: Osteoclasts: