Puas yog osteocytes zais cov lej?

Video: Puas yog osteocytes zais cov lej?

2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44

Osteocytes ua tsis faib thiab muaj ib nrab ntawm lub neej ntawm 25 xyoo. Osteoblasts / osteocytes txhim kho hauv mesenchyme. Hauv cov pob txha loj hlob, osteocytes thiab lawv cov txheej txheem nyob hauv qhov chaw hu ua lacunae (Latin rau lub qhov) thiab Canaliculi, feem. Osteocytes tsuas yog osteoblasts cuab nyob rau hauv matrix tias lawv zais.

Hais txog qhov no, osteocytes tsim dab tsi?

Osteocytes secrete loj hlob yam uas ua kom cov pob txha kho tom qab tawg, thiab noj qab nyob zoo osteocytes tuaj yeem nkag siab thiab qhia txog kev kho tsis tu ncua ntawm microdamage hauv koj lub cev pob txha.

Ib yam li ntawd, pom osteocytes nyob qhov twg? Txhua cov osteocyte yog nyob hauv qhov chaw (lacuna) puag ncig los ntawm cov nqaij pob txha. Osteocytes tswj cov ntxhia hauv lub matrix los ntawm kev tso cov enzymes. Raws li qhov tshwm sim ntawm osteoblasts, osteocytes tsis muaj kev ua haujlwm mitotic.

Yog li ntawd, ua li cas osteoblasts tsim cov pob txha matrix?

Hauv cov pab pawg sib txuas ntawm cov hlwb, osteoblasts tsim hydroxylapatite - cov pob txha mineral, uas yog deposited nyob rau hauv ib tug heev regulated yam, mus rau hauv lub organic matrix tsim cov ntaub so ntswg muaj zog thiab ntom - cov ntxhia matrix.

Leej twg pom osteocytes?

1). Nws tau thov los ntawm Manolagas (9) tias cov matrix-tsim osteoblast tuaj yeem dhau los ua ib qho osteocyte , ib lub cell hauv ob sab phlu, lossis tuaj yeem raug programmed cell tuag. Nws txoj kev xav tau ua raws li kev soj ntsuam ntawm lwm tus thawj coj ua ntej, Michael Parfitt, uas tau hais tias osteoblasts yuav tsum tuag los ntawm apoptosis.

Pom zoo:

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Lub zais pa sawv cev dab tsi lub raj mis sawv cev yog lub zais pa sab hauv lossis sab nraum lub raj mis?

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Dab tsi yog cov enzymes ua rau lub zais zis zais?

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