BIOL 207 Lecture Notes - Lecture 13: Somatomedin, Epiphyseal Plate, Osteoclast
21 Oct 2016
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Bone maintenance and remodeling: deposition: movement of calcium, phosphate and other nutrients from blood to bone, reabsorption: movement of nutrients from bone back into blood. Reabsorption -> stimulate osteoclasts -> decrease bone size. Deposition -> stimulate osteoblasts -> increase bone size. Hormonal control of bone development: parathormone, calcitonin, growth hormone (gh)/somatotropin, thyroxin, testosterone and estrogen. Stimulates epiphyseal plate -> produce more bone. Stimulates liver to produce second growth factor. Somatomedin: stimulate growth plate to produce more bone cells. Sex hormones also stimulate growth hormone (growth spurts) Does not serve as a structural unit of bone. 1the place of union between two or more bones regardless of the degree of movement permitted by the junction. Structural classification of joints: fibrous, cartilaginous, synovial. Based on whether or not a joint cavity exists. Edges of bones often have interdigitation that fit together tightly. In due time the connective tissue is ossified and becomes bone.
