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13 Cards in this Set
- Front
- Back
Osteons in compact bone are situated how? What is their function? |
Osteons run longitudinally with the axis of the bone, functioning as weight-bearing pillars, resisting compression. |
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Spongy bone is also composed of osteocytes and extracellular matrix, but the bone cells... |
Do not form clusters around the central canal like compact bone, instead they lie in trabeculae and get nutrients from substances diffusing into the canaliculi. |
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Endochondral bones replace |
Bones that begin as masses of hyaline cartilage |
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Osteoblasts vs osteoclasts |
Osteoblasts = build Osteoclasts = breakdown |
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Osteoblasts and osteoclasts are ________. |
Always breaking down bones. |
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Endochondral bones vs intramembranous bones |
Endochondral bones = cartilage Intramembranous bones = sheet-like. |
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Extra blood calcium leads to _____ which leads to _______. |
Extra blood calcium leads to calcification which leads to increased bone calcium. |
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Low blood calcium leads to ____ which leads to _____. |
Low blood calcium leads to parathyroid hormone (PTH) which leads to decreased bone calcium. |
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Which is more important: blood calcium or bone calcium? |
Blood calcium. |
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Which bones have styloid processes? |
- look up in book - |
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Most bones of the skeleton are _____ bones that develop from ____. |
Endochondral bones, that develop from masses of hyaline cartilage. |
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Once completely surrounded by the bony matrix, osteoblasts are called... |
Osteocytes. |
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The ____ of the ____ bone is a ___ for the _____ gland. |
Sella turcica of the sphenoid bone is a seat for the pituitary gland. |