2) The cell responsible for secreting the matrix of bone is the A) osteoblast 2)

Question

2) The cell responsible for secreting the matrix of bone is the A) osteoblast 2) B) osteoclast D) chondrocyte ) osteocyte 3) What kind of tissue is the forerunner of long bones in the embryo? 3) A) fibrocartilage C) hyaline cartilage B) elastic connective tissue D) dense fibrous connective tissue 4) A fracture in the shaft of a bone would be a break in the A) metaphysis C) diaphysis B) articular cartilage D) epiphysis 5) Ossification of the ends of long bones A) involves medullary cavity formation B) is produced by secondary ossification centers C) is a characteristic of intramembranous bone formation D) takes twice as long as diaphysis ossification 6) 6) Which structure allows the diaphysis of the bone to increase in length until early chidhood? A) epiphyseal line Q Haversian system B) lacunae D) epiphyseal plate 7) Which of the following is not a function of the skeletal system? A) production of blood cells (hematopoiesis) C) storage of minerals B) communication D) support 8) 8) What is the structural unit of compact bone? B) spongy bone C) lamellar bone D) osscous matrix A) the osteon 9) Bones are covered and lined by a protective tissue called periosteum. The inner (osteogenic)layer consists primarily of A) cartilage and compact bone C) chondrocytes and osteocytes B) marrow and osteons D) osteoblasts and osteoclasts 10) 10) The canal that runs through the core of each osteon (he Haversian canal) is the site of A) blood vessels and nerve fibers C) cartilage and interstitial lamellae B) adipose tissue and nerve fibers D) yellow marrow and spicules

Explanation / Answer

2. (A) osteoblasts, bone is a dynamic tissue that is constantly reshaped by osteoblasts, which produce matrix protein.

3.(c) hyaline cartilage, bone is either formed by direct ossification of embryonic ossification or by hyaline cartilage.

4(c) diaphysis, because the epiphysis and growth plates are found at end of the bones.

8(a) osteon, the osteon or haversian system is fundamental functional unit of much compact bone.

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