Drag each label into the proper position to identify the type of bone cell described. Parathyroid hormone inhibits these cells from synthesizing collagen Bone building cells Calcitriol causes these cells to differentiate into osteoclasts Bone resorbing cells Calcitonin causes these cells to become more active Stem cells These cells should become more active when blood calcium levels are high Parathyroid hormone causes these cells to become more active Massive, multinucleate cells Overactivity of these cells could contribute to hypocalcemia Bone cells encased in matrix Involved with bone deposition Osteogenic cells Osteoblasts Osteoclasts Osteocytes
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11. When blood calcium levels begin to drop below homeostatic levels, parathyroid hormone is released causing calcium to be released from the bones. 12. Large tubercles or processes and/or increased deposit of bony matrix occur at sites of mechanical stress. 13. Immature, or matrix-depositing, bone cells are referred to as osteoblasts. 14. Calcitonin causes blood calcium to be deposited in bones. 15. Bone cells that liquefy bone matrix and release calcium into the blood are called osteoclasts.
Madhur L.
'Bone cells that break down extracellular matrix bone remodeling during are: osteoprogenitor cells osteocytes osteoclasts osteoblasts'
Adi S.
1. Difference between bone deposition and bone resorption. 2. Where does this occur? 3. Why is bone remodeling not a uniform process? 4. When does bone deposition occur, and when does bone resorption occur? 5. What role do osteoclasts play? 6. Where do osteoclasts come from? 7. What substances do they secrete? 8. What are the hormonal controls over bone remodeling and what is their purpose? (PTH, Calcitonin) 9. Where are these hormones produced? 10. When blood calcium levels are low, what hormone is produced? 11. When blood calcium levels are high, what hormone is produced? 12. Are these processes negative or positive feedback systems? 13. How do bones respond to mechanical stress and what is its relation to hormonal remodeling?
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