Ossification intramembranaire | Quizalize

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Ossification intramembranaire | Quizalize

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Ossification intramembranaire

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Q 1/10
Score 0
Quel est le principal type de tissu osseux impliqué dans l'ossification intramembranaire ?
30
Tissu osseux spongieux
Tissu cartilagineux
Tissu conjonctif dense
Tissu musculaire
Q 2/10
Score 0
Quel est le rôle principal des ostéoblastes dans le processus de l'ossification intramembranaire ?
30
Réguler le métabolisme minéral
Décomposer le tissu osseux
Stocker les lipides
Produire de la matrice osseuse

10 questions

Q.

Quel est le principal type de tissu osseux impliqué dans l'ossification intramembranaire ?

1

30 sec

Q.

Quel est le rôle principal des ostéoblastes dans le processus de l'ossification intramembranaire ?

2

30 sec

Q.

Dans quel type de os l'ossification intramembranaire se produit-elle principalement ?

3

30 sec

Q.

Quel est un exemple d'os formé par ossification intramembranaire ?

4

30 sec

Q.

Quel facteur peut influencer le processus d'ossification intramembranaire ?

5

30 sec

Q.

Quel processus cellulaire est principalement impliqué dans la conversion du tissu conjonctif dense en tissu osseux lors de l'ossification intramembranaire ?

6

30 sec

Q.

Quel est le principal produit final de l'ossification intramembranaire ?

7

30 sec

Q.

Quel est le stimulus mécanique qui peut activer l'ossification intramembranaire ?

8

30 sec

Q.

Quel est le principal moyen par lequel le calcium est incorporé dans la matrice osseuse lors de l'ossification intramembranaire ?

9

30 sec

Q.

Quel type de cellules joue un rôle important dans la remodelage du tissu osseux après l'ossification intramembranaire ?

10

30 sec

Related quizzes

Ossification
Ossification endochondrale
Endochondral ossification (cont’d) Secondary ossification center appears in the epiphysis (shortly after birth); no bone collar During remodeling, cavity is produced that fills with bone marrow 2 areas of cartilage remain Articular Epiphyseal (responsible for bone growth in length) Closure of plates is complete by age 20 Once closed, growth in length is stopped
Primary ossification center produced Chondrocytes enlarge,compress matrix (into trabeculae), calcify matrix (release enzymes and osteocalcin), die & leave large empty lacunae (cavity); periosteal bud brings osteoprogenitor cells & osteoblasts which lay down bone (woven) matrix on septa of cartilage matrix Osteoclasts resorb calcified cartilage/bone complex and enlarge cavity which fills with bone marrow; bone replaces cartilage along diaphysis
OSTEOGENESIS OF BONE (INTRAMEMBRANOUS VS. ENDOCHONDRAL) Intramembranous ossification (most flat bones of skull) Occurs w/in condensations of embryonic mesenchymal cells Differentiate into osteoblasts (takes place in primary ossification center) which surround capillaries Osteoid matrix is produced and then calcified forming trabeculae (islands of bone) of woven (primary) bone; its surface is surrounded by osteoblasts Trabecular growth leads to the fusion of adjacent ossification centers which gradually produce layers of compact bone that encloses spongy (cancellous) bone
Perichondrium is vascularized & bone collar formed Perichondrium becomes periosteum with osteoblasts which secrete bone matrix (collar blocks nutrients from reaching chondrocytes) Primary ossification center produced Chondrocytes enlarge,compress matrix (into trabeculae), calcify matrix (release enzymes and osteocalcin), die & leave large empty lacunae (cavity); periosteal bud brings osteoprogenitor cells & osteoblasts which lay down bone (woven) matrix on septa of cartilage matrix Osteoclasts resorb calcified cartilage/bone complex and enlarge cavity which fills with bone marrow; bone replaces cartilage along diaphysis
Zones in epiphyseal cartilage (regions of cellular activity) Zone 1: Zone of Resting cartilage Zone 2: Zone of proliferating cartilage Chondrocytes aligned as aggregates in lacunae Zone 3:Zone of hypertrophic cartilage Cells enlarge; matrix compressed into bands Zone 4: zone of calcified cartilage Cells calcify the matrix (hydroxyapatite crystals formed); undergo apoptosis Zone 5: Zone of ossification Vessels invade region; osteoblasts deposit osteoid on calcified spicules of cartilage forming woven bone; remodeled as lamellar bone
Desmale Ossifikation