17). Describe the stages of endochondral ossification and name at least one (1) bone that is...

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17). Describe the stages of endochondral ossification and nameat least one (1) bone that is formed using this process.
18). What effect does the hormone calcitonin have on bloodcalcium levels & how does it produce this effect? Explain.
19). What effect does parathyroid hormone have on blood calciumlevels & how does it produce this effect? Explain.
20). How is vitamin D synthesized and what effect does vitamin Dhave on blood calcium concentrations? Explain.

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17 Endochondral ossification steps 1 Bone Collar Formation The primary ossification center develops in the center of the bone and is the source of bone development Osteoblasts found in the bone will secrete osteoid against the walls of the diaphysis The diaphysis made of hyalin cartilage is now encased in compact bone This bone collar gives the developing bone structural support to begin hardening 2 Cavitation The chondrocytes go through hypertrophication or enlargement and signal the hyalin cartilage to harden into bone This hardening into bone is called See Answer

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