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Intramembranous ossification is common in children, whereas endochondral ossification is typical in young adults
A bone is covered externally with a sheath called ______________, whereas the internal surface is lined with _____________.
When ____________ become enclosed in lacunae, they become cells called _____________.
lacunae; sites of residence of osteocytes
This image shows the histology of osseous tissue. Label "2" represents ____________, which is(are) ____________.
Hydroxyapatite and other minerals; proteins
____________ provide(s) hardness to bones, whereas ____________ provide(s) some degree of flexibility.
___________ have a ruffled border with many deep infoldings of the plasma membrane, whereas ____________ have long, thin, fingerlike cytoplasmic processes.
yellow bone marrow
What would you find in the marrow cavity of the diaphysis of an adult humerus (arm bone)?
Endochondral ossification is a precursor made of _____________ is replaced by bone.
The _____________ is a marginal zone of the epiphyseal plate where, in children and adolescents, bone can be seen replacing the hyaline cartilage.
Achondroplastic dwarfism is a hereditary condition in which the long bones of the limbs fail to elongate normally because of reduced hyperplasia and hypertrophy of cartilage in the
E. articular cartilage and epiphyseal plate.
A growing long bone in a child has only two areas of cartilage at the epiphysis. These two areas are
_____________ is the process of dissolving bone and returning its minerals to the bloodstream.
the first few crystals to form attract more calcium and phosphate
Which of the following exemplifies a positive feedback process happening in bone mineral deposition?
____________ is synthesized by the combined action of the skin, kidneys, and liver, and is important to the deposition of bone
parathyroid hormone; increased osteoclast activity
Blood Ca2+ deficiency stimulates __________ secretion, which leads to _____________.
abnormal calcification of a tissue.
Arteriosclerosis is one example of ectopic ossification, which means
an elevated level of osteoblast activity
If a thyroid tumor secreted an excessive amount of calcitonin, we would expect
estrogen; osteoclast activity
Osteoporosis is most common in elderly women because of the lack of ___________, which would otherwise inhibit ____________.
A fracture in which the bone is broken into three or more pieces is called a __________ fracture.
The result of calcium and phosphate levels in blood too low for normal deposition is a softness of the bones called ___________ in children and ___________ in adults.
hematoma formation soft callus formation hard callus formation bone remodeling
Which of the following is the correct sequence of events in the healing of a bone fracture?
soft callus; hard callus
Patches of fibrocartilage formed in the healing of a fracture are called ________, whereas the bony collar formed around the fracture is called _________.
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