2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Fibroblasts tsim collagen fibers uas txuas cov pob txha tawg kawg, thaum osteoblasts pib tsim cov pob txha spongy pob txha Fibroblasts tsim collagen fibers uas txuas cov pob txha tawg, thiab osteoblasts pib tsim cov pob txha spongy. Kev kho cov ntaub so ntswg ntawm cov pob txha tawg yog hu ua fibrocartilaginous callus, raws li nws yog tsim los ntawm ob qho tib si hyaline thiab fibrocartilage (Daim duab 2). Qee cov pob txha spicules kuj tuaj yeem tshwm sim ntawm qhov no. https://courses.lumenlearning.com › wm-biology2 › tshooj
pob txha loj hlob thiab kev loj hlob | Biology rau Majors II - Lumen Learning
. Kev kho cov ntaub so ntswg ntawm cov pob txha tawg, cov fibrocartilaginous callus, yog tsim los ntawm ob qho tib si hyaline thiab fibrocartilage.
Dab tsi fibroblasts pab txhawb kev kho pob txha?
fibroblasts pab kho pob txha li cas? Fibroblasts tsim cov hematoma uas suav nrog cov qe ntshav ntau. Fibroblasts tsim cov collagen fibers tshiab los txuas qhov sib txawv ntawm cov pob txha tawg.
Cov hlwb dab tsi ua rau cov txheej txheem calcification thaum lub sij hawm ossification?
daim duab 14.11. Schematic daim duab ntawm intramembranous ossification. (A) Mesenchymal hlwb condense los tsim osteoblasts, uas tso nyiaj osteoid matrix. Cov osteoblasts no ua arrayed raws thaj tsam calcified ntawm matrix.
Cov hlwb twg yog lub luag haujlwm rau kev tawg pob txha?
OSTEOCLASTS yog cov hlwb loj uas yaj cov pob txha. Lawv tuaj ntawm cov pob txha pob txha thiab muaj feem xyuam nrog cov qe ntshav dawb. Lawv yog tsim los ntawm ob los yog ntau lub hlwb uas fuse ua ke, yog li cov osteoclasts feem ntau muaj ntau tshaj ib tug nucleus. Lawv pom nyob rau saum npoo ntawm pob txha pob zeb nyob ib sab ntawm cov pob txha tawg.
Qhov twg hauv qab no txhawb cov pob txha resorption?
Parathyroid hormone (PTH) txhawb cov pob txha resorption los ntawm kev ua ncaj qha rau osteoblasts / stromal hlwb thiab tom qab ntawd indirectly kom muaj kev sib txawv thiab kev ua haujlwm ntawm osteoclasts. PTH ua rau osteoblasts / stromal hlwb nce collagenase gene transcription thiab synthesis.
Pom zoo:
Dab tsi ua kom pob txha pob txha ntawm cov pob qij txha?
pob txha muab cov duab, txhawb nqa, thiab qauv rau lwm cov ntaub so ntswg hauv lub cev. Nws kuj yuav pab tau cov pob qij txha. Pob txha mos kuj smoothens cov pob txha nto ntawm cov pob qij txha. Cov ntaub so ntswg dab tsi npog cov pob txha ntawm cov pob qij txha?
Puas yog pob txha pob txha pob txha zoo ib yam li meniscus?
Cov pob txha mos yog qhov tawv tab sis du npog ntawm qhov kawg ntawm cov pob txha hauv cov pob qij txha. Nws tso cai rau gliding yam tsis muaj kev tiv thaiv ntau thiab ua haujlwm nrog cov meniscus kom cushion kawg ntawm cov pob txha. Lub meniscus nyob nruab nrab ntawm lub femur thiab tibia.
Dab tsi qhov sib txawv ntawm cov pob txha pob txha thiab pob txha?
Cov pob txha pob txha yog tsim los ntawm osteons thiab tsim cov txheej txheem sab nraud ntawm txhua pob txha. Cov pob txha pob txha yog tsim los ntawm trabeculae thiab ua rau sab hauv ntawm txhua pob txha. Dab tsi yog qhov sib txawv ntawm cov pob txha pob txha thiab pob txha pob txha?
Puas yog lub pob txha pob txha pob txha pob txha?
CONCLUSIONS: vertebral endplate raug mob feem ntau pom hauv osteoporotic vertebral compression fractures. Dab tsi ua rau lub pob txha tawg? Nws yog kev xav tias, nyob rau hauv ntau qhov mob ntawm qhov mob qis qis, thawj qhov ua rau mob yog pob txha ntawm pob txha caj qaum los ntawm compression rog.
Vim li cas pob txha pob txha txawv ntawm cov pob txha li niaj zaus?
Thaum osteoporosis tshwm sim, lub qhov thiab qhov chaw hauv lub honeycomb loj dua li cov pob txha noj qab haus huv. Cov pob txha osteoporotic muaj poob ntom lossis loj thiab muaj cov ntaub so ntswg txawv txav. Raws li cov pob txha tsis tshua muaj zog, lawv tsis muaj zog thiab feem ntau yuav tawg.
