Complete the following statements by writing the letter with the correct answer on the line. a. calcitonin b. osteoblasts c. osteoclasts d. osteocytes e. parathyroid hormone f. mechanical stress ___11. When blood calcium levels begin to drop below homeostatic levels, ____ 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 ____. ___13. Immature, or matrix-depositing, bone cells are referred to as ____. ___14. ____ (hormone) causes blood calcium to be deposited in bones. ___15. Bone cells that liquefy bone matrix and release calcium into to the blood are called ____.
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Calcitonin is a hormone that is released when blood calcium levels begin to drop below homeostatic levels. Show more…
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When blood calcium levels fall too low, the body will stimulate cells called osteoclasts. These osteoclasts have a specialized plasma membrane with a ruffled border. This allows for efficient release of acids and enzymes to dissolve bone tissue, releasing calcium back into the blood. As a result, blood calcium level rises back to normal levels. The ruffled border of the osteoclast is an example of which of the following? living things being organized structure complementing function homeostasis biological feedback
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Bone is a dynamic tissue constantly undergoing change. As shown in the diagram below, two sets of bone cells work in opposition to one another to maintain bone homeostasis. Osteoblasts build bone, while osteoclasts break down bone. Blood calcium levels change in response to these cell activities. Osteoblasts Osteoclasts Bone building Bone breakdown Calcium in blood Calcium in blood Calcitonin is a hormone produced by the thyroid gland. Calcitonin is released whenever blood calcium levels go up. Calcitonin travels through the blood to bone, where it activates one of the two types of bone cells and inhibits the other type. Predict the type of cells that will be activated by calcitonin. Predict the type of cells that will be inhibited by calcitonin. Justify your responses.
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