the process of laying down new bone material by cells called osteoblasts. It is synonymous with bone tissue formation.
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15
explain the difference between medial and lateral.
Medial is closer to the mid line lateral is farther away from the midline. The nose is medial to the ear. the ear is lateral to the nose
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15
Explain the difference between proximal and distal.
proximal is closer to the point of attachment of a limb. Distal is farther from the point of attachment of a limb. The foot is distal to the knee
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15
What do osteoclasts secrete to accomplish their function?
Osteoclasts dissolve bone mineral by massive acid secretion and secrete specialized proteinases that degrade the organic matrix, mainly type I collagen,
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15
When does your body secrete PTH and where does it come from?
When Ca+ levels in the blood drop, it come from the parathyroid gland. It causes an increase in osteoclast activity and a decrease in osteoblast activity
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lifesaver
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seesaw
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fairy
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baam
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25
List 3 of the 6 types of synovial joints and example of each
gliding (plane):scapula and clavical, hinge:knee or elbow, pivot:neck, ellipsoid:hand, saddle:thumb, ball and socket:hips and shoulder
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25
Define osteoclast, osteocyte and osteoblast.
clast - breaks down bone, cyte - mature bone cell(creates the matrix), blast
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seesaw
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rocket
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rocket
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baam
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trap
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fairy
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shark
Other team loses 25 points!
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lifesaver
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15
What are the canaliculi?
processes that extend from the main body of an osteocyte to allow them to communicate with each other. The canaliculi touch each other
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15
label the structures of compact bone tissue and what is the whole cylindrical structure called?
a. lamella (concentric), b. lacuna, c. central (haversian) canal, d. canaliculi. Whole structure is the osteon(interstitial lamellae?)
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25
name the 3 types of joints and an example.
Fibrous=-sutures (head) and syndesmosis (forearm),Cartilaginous- costal cartilage and pubis symphysis and spine, Synovial â allows for free movement
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25
When do bones need to be remodeled to their original shape? 3 reasons
1.to repair broken bones. 2. To replace worn out collagen or hydroxyapatite. 3. To regulate calcium levels in the body.
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15
A medical researcher shows you an epiphyseal plate that has been removed from an immature bone. The researcher wants to know which side of the plate was close to the diaphysis. Can you tell?
Yes, look for the side that is partially ossified. Remember the epiphyseal plate only grows on the side towards the diaphysis
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15
How do the sex hormones affect bone growth?
They cause a rapid growth spurt(an increase in the osteoblast activity), and they cause the epiphyseal plates to ossify.