Term
| Which type of cell is capable of dividing to produce new osteoblasts? |
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Definition
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Term
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Definition
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Term
| The basic functional unit of mature compacct bone is the |
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Definition
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Term
| Endochondral ossification begins with the formation of |
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Definition
| a hyaline cartilage model |
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Term
| When sexual hormone production increases,bone production |
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Definition
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Term
| The presence of an epiphyseal line indicates that |
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Definition
| epiphyseal growth has ended |
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Term
| The inadequate ossification that occurs with aging is called |
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Definition
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Term
| The process by which the diameter of a developing bone enlarges is |
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Definition
| appositional growth at the outer surface |
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Term
| The sturnum is an example of a(n) |
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Definition
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Term
| A small, rough projecction of a bone is termed a |
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Definition
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Term
| How would decreasing the proportion of organic molecules to inorganic components in the bony matrix afffect the physical characteristicsof bone? |
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Definition
| the bones would be more brittle |
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Term
| Premature closure of the epiphyseal cartilages could be caused by |
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Definition
| elevated levels of sex hormones |
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Term
| What factors determine the type of ossification that ouccurs in a specific? |
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Definition
| In intramembranous ossification, bone develops from mesenchyme or fibrous connective tissue.In endochondral ossification, bone replaces an existing cartilage model. |
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Term
| What events signal the end of long bone elongation? |
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Definition
| At maturity, the rate of epiphyseal cartilage growth slows down,while the rate of osteoblast production increases, narrowing the region of the epiphyseal plate.When the pplate disappears, the epiphysis and diaphysisof the bone grow together, and elongation stops. |
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Term
| How does a bone grow in diameter? |
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Definition
A bone grows in diameter by appositional growth, wherein the outer surface of the bone
grows as cells of the periosteum differentiate into osteoblasts that contribute to the bone
matrix. Eventually, these cells become surrounded by matrix and differentiate into
osteocytes. Additionally, the bone matrix is removed from the inner surface by osteoclasts to
expand the medullary cavity.
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Term
Why is a healed area of bone less likely to
fracture in the same place again from similar
stresses? |
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Definition
The final repair is slightly thicker and stronger than the original bone.
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Term
Why will a diet that consists mostly of junk foods
hinder the healing of a fractured bone?
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Definition
A fractured bone requires a good supply of calcium and phosphate to manufacture new
matrix. Therefore, a diet that is low in these minerals will hinder the rate at which a broken
bone heals.
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Term
What properties are used to distinguish a
sesamoid bone from a sutural bone?
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Definition
A sesamoid bone is usually small, round, and flat. It develops inside tendons and is most
often encountered near joints at the knee, the hands, and the feet. Sutural (Wormian) bones
are small, flat, oddly shaped bones found between the flat bones of the skull in the suture line.
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Term
Contrast the processes of ossification and
calcification.
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Definition
Ossification is the process of replacing other tissues with bone. Calcification refers to the
deposition of calcium salts within a tissue.
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