Week 3.2 The Bone Flashcards
About 90% of the organic part of bone matrix is collagen; the rest includes
Proteoglycans and multiadhesive glycoproteins
In a developing long bone, the osteoblasts within the perichondrium form the
Bone Collar
During healing of a bone fracture, which tissues produce the woven bone that forms the callus?
Periosteum and endosteum
Parathyroid hormone causes
Stimulation of osteoclast activity.
Release of Ca ions from bone.
Resorption of bone matrix.
In a long bone, the primary ossification center is in the
Diaphysis
Which of these is true about bone?
Compact bone is a type of lamellar bone.
Cancellous bone is a type of lamellar bone
Lamellar bone is remodeled from woven bone.
Periosteum (both layers) contains
Type 1 collagen and fibroblasts
Blood vessels
Osteoblasts and osteoprogenitor cells.
The connective tissue that lines the bony trabeculae in the marrow cavity is called
Endosteum
In a bone fracture, which cells remove the blood cells of a hematoma?
Macrophages
What is the function of Sharpey fibers?
They bind the periosteum to the bone.
Cancellous bone is also known as
Trabecular bone
Hydroxyapatite is the mineral component of bone. It is composed primarily of which ions?
Calcium and phosphate
The result of epiphyseal closure is that
Growth in the length of the bone has stopped.
Secondary metastatic tumors in bone are the result of
Cancer cells from other organs that move into bones via small blood or lymphatic vessels.
How much of the dry weight of bone matrix is inorganic?
50%
