Bones and Skeletal Tissues 1
Bones and Skeletal tissues 2
Ossification
Bone Remodeling
Misc.
100
How many bones are in the human body?
206
100
What kind of cell can an osteoblast turn into?
Osteocyte
100
How are bones created?
Through Ossification
100
What osteo cell is responsible for bone deposition?
Osteoblasts
100
What causes bone fractures when you are young?
Trauma
200
What does the word "osteo" mean?
Bone
200
What kind of cell do Osteoprogenitor cells most often times turn into?
Osteoblast
200
Why do bones thicken (get wider)?
In response to increased mechanical stress or weight gain.
200
What osteo cell is responsible for bone resorption?
Ostoeclasts
200
What causes bone fractures when you are older ~<45?
Weakness of bone due to thinning
300
What does the human skeleton start off as initially?
Cartilage
300
What kind of Osteo Cell can an Osteoprogenitor cell turn into?
Any other osteo cell.
300
How do bones grow in width?
Through appositional growth
300
What are the two parts to Bone Remodeling?
Bone Deposition and Bone Resorption
300
What is unique about the skull?
Only area where all bones are fused together.
400
What are the four general types of bone shapes?
Long, Short, Flat, Irregular
400
800 point question:
What are the organic and inorganic parts of the bones?
Organic: Osteo cells
Inorganic: Mineral salts ~ hydroxyapatites.
400
How do bones grow in Length?
Through interstitial growth
400
What is Wolf's Law?
Bones grow or remodel in response to demands placed on them.
400
Where does bone lengthening occur on the bone?
On the epiphyseal line/plate
500
What is the difference in Red and Yellow Bone Marrow?
Red bone marrow is found in spongy bone and produces blood cells.
Yellow bone marrow is found in the medullary cavity and is responsible for fat storage.
500
Have a member of your team come up to the board and draw any long bone and label the diaphysis, both epiphyses, the epiphyseal line, medullary cavity, spongy bone, and compact bone.
500
Put the five steps to ossification in order from one to five:
_____ Periosteal bud invades cavities, leading to formation of spongy bone
_____ Epiphyses ossify
_____ Bone collar forms around diaphysis (shaft) of cartilage model
_____ Diaphysis elongates, and medullary cavity forms
_____ Central cartilage in diaphysis calcifies, then develops cavities
1. Bone collar forms around diaphysis (shaft) of cartilage model
2. Central cartilage in diaphysis calcifies, then develops cavities
3. Periosteal bud invades cavities, leading to formation of spongy bone
4. Diaphysis elongates, and medullary cavity forms
5. Epiphyses ossify
500
What are two things that can be explained by Wolf's Law?
Handedness (right- or left-handed) results in thicker and stronger bone of the corresponding upper limb
Curved bones are thickest where most likely to buckle
Trabeculae form trusses along lines of stress
Large, bony projections occur where heavy, active muscles attach
Bones of fetus and bedridden people are featureless because of lack of stress on bones
500
What zone does the majority of bone lengthening occur at?
Proliferation zone.