| 21. | Microgravity impedes the development of bone cells.
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| 22. | The researchers discovered that mice lacking a key estrogen-regulating protein were unable to grow enough bone cells.
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| 23. | He researched the deformation of bone cells.
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| 24. | Cultured on bone material, they will form bone cells; in a gel, they grow into cartilage-making cells.
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| 25. | Recent research has also implicated these novel receptors in muscle growth and bone cell differentiation and proliferation.
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| 26. | The fossil shows many details of these, even the internal structure of some muscle and bone cells.
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| 27. | EIKF2AK3 is also involved in bone cells.
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| 28. | This is important because without the bone morphogenetic proteins the bone cells would turn into fat cells.
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| 29. | Normally, when a bone undergoes physical stress, the body forms new bone cells to offset the pressure.
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| 30. | Over time, bone cells from the patient would grow into these spaces and fix the stem in position.
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