a&p Chapter 6

Place the following steps of bone repair in the correct sequence. 1. The bone callus is remodeled and primary bone is replaced with secondary bone. 2. A hematoma fills the gap between bone fragments. 3. Osteoblasts build a new bone callus. 4. Fibroblasts and chondroblasts infiltrate the hematoma and a soft callus forms. 2, 3, 4, 1 2, 4, 3, 1 3, 2, 4, 1 3, 2, 1, 4

2,4,3,1

How long does bone repair generally take? 12-16 weeks 6-8 weeks 2-4 weeks 4-6 months

6-8 weeks

Part complete All bone growth completely stops by the end of adolescence. True False

False

Part complete Bone provides the site of attachment for most smooth muscles. True False

False

The epiphyseal plate is a layer of compact bone from which longitudinal growth occurs. True False

False

The kneecap (patella) is considered a short bone since it is a round, flat bone located within tendons. True False

False

Part complete Which statement best describes primary bone? Primary bone has regularly arranged parallel bundles of collagen fibers for strength. Primary bone contains abundant osteocytes and little inorganic matrix. Primary bone is stronger than secondary bone since it contains many lamellae. Primary bone contains a higher percentage of inorganic matrix than secondary bone.

Primary bone contains abundant osteocytes and little inorganic matrix.

How would the removal of hydroxyapatite crystals from bone matrix affect the physical properties of a bone? The bone would be more flexible. The bone would be stronger. The bone would be less compressible. The bone would be less flexible.

The bone would be more flexible.

Part complete Spongy bone resists forces from many directions and forms a protective framework for the red bone marrow. True False

True

The process of ossification begins at a primary ossification center in both intramembranous and endochondral ossification. True False

True

Which of the following structures in a bone persists for life? articular cartilage epiphyseal plate primary bone primary ossification center

articular cartilage

Part complete What canals connect lacunae together? canaliculi central (Haversian) canals central canals perforating (Volkmann's) canals

canaliculi

Part complete The layers of bone tissue immediately deep to the periosteum are: trabeculae. lacunae. concentric lamellae. circumferential lamellae.

circumferential lamellae.

Part complete Thin, broad bones should be classified as: irregular bones. short bones. long bones. flat bones.

flat bones

The patella is classified as a sesamoid bone since it: has a diaphysis and epiphyses. has an irregular shape. is located within tendons. is longer than it is wide.

is located within tendons

The bones of the arms and legs are classified as: short bones. irregular bones. long bones. flat bones.

long bones

What cells contribute to the process of calcification during intramembranous ossification? osteocytes osteoblasts keratinocytes osteoclasts

osteoblast

Part complete Bones are constantly undergoing resorption for various reasons. Which of the following cells accomplishes this process? osteoclast osteocyte osteoblast osteogenic cell

osteoclast

Part complete Bone resorption requires the activity of: osteoclasts. osteoblasts. chondrocytes. osteocytes.

osteoclasts

Relatively inactive bone cells that help to maintain the ECM are: osteoblasts. osteogenic cells. osteoclasts. osteocytes.

osteocytes

The structural units of mature compact bone are called: canaliculi. osteons. osteocytes. lacunae.

osteons.

Part complete Which of the following promotes bone resorption? compression tension calcium-rich diet pressure

pressure

Which of the following are NOT components of an osteon? canaliculi trabeculae lacunae lamellae

trabeculae

Part complete The ribs and sternum are classified as flat bones because they are thin and broad. True False

true