Question

Compact bone is primarily made up of calcium, which does not dissolve after the bone breaks down. Based on this fact, which of the following could be caused by a decrease in osteoblast activity? Low blood calcium levels and a lack of bone growth High blood calcium levels and excessive bone growth Low blood calcium levels and excessive bone growth High blood calcium levels and a lack of bone growth.

Answer 1

High blood calcium levels and a lack of bone growth could be caused by a decrease in osteoblast activity. Osteoblasts form bones.

Osteoblasts are a specialized type of cell that is capable of forming new bones.

Osteoblasts derive from mesenchymal stem cells, which are located in the bone marrow.

These cells (osteoblasts) can be found on the surface of the newly formed bone tissue where they generate the components of the bone matrix.

Osteoblasts are involved in bone mineralization and control the delicate balance between calcium and phosphate ions in the newly developing bone tissue.

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