Matching Pairs 1.2.7 Bone RemodelingOnline version Calcium feedback and steps of bone remodeling by Laura Roy 1 Hypocalcemia 2 Hypercalcemia 3 Osteoclast 4 Step 2 of Bone Remodeling 5 Step 3 of Bone Remodeling 6 Osteoblast 7 Parathyroid hormone 8 Thyroid gland 9 Parathyroid 10 Calcitonin 11 Step 1 of Bone Remodeling 12 Step 4 of Bone Remodeling Low calcium levels A hormone that increases Ca in the blood by stimulating bone to be broken down. Builds bone Releases parathyroid hormone A hematoma is a “blood tumor” that forms at the site of the break This painful, swollen area fills with blood from the broken blood vessels Bony Callus Formation. Takes several weeks to months. Osteoclasts break down fibrous cartilage Osteoblasts lay new bone matrix, made of osteocytes. Bone is MOSTLY healed at this stage Releases calcitonin Breaks down bone Fibrocartilaginous callus formation. Connective tissue stem cells & capillary blood vessels penetrate. Phagocytes clear away junk. Cartilage and blood vessels start to form to create new bone A hormone that lowers Ca in blood by stimulating bone to be built. Bone Remodeling - Compact bone replaces woven bone. Internal callus removed. Medullary cavity is restored High calcium levels