Which of the following causes bone matrix resorption in response to a decrease of calcium levels in the blood?

Question

Quizplus · Accepted Answer

The body needs calcium to build and fix bones, help nerves work, make muscles squeeze together, help blood clot, and help the heart work. Almost all (about 99%) of the calcium in the body is stored in bone.
When calcium-sensing membrane receptors in the parathyroid gland detect that there are low levels of calcium in the blood, it releases parathyroid hormone. Parathyroid hormone increases the number and activity of osteoclasts (osteo- means "bone" and clast means "broken"), which are cells that break down the tissue in bones and release the minerals, resulting in a transfer of calcium from bone tissue to the blood (this process is called bone resorption).
Osteoprogenitor cells (also called osteogenic cells) are the stem cells of bone. They form osteoblasts.
Osteoblasts are the cells that secrete the matrix for bone formation.
Osteocytes are matured bone cells, formed when an osteoblast becomes embedded in the matrix it has secreted. They continue to maintain the bone tissue.
 11ec0fda_9993_cc44_a67f_fff14336d56c_NR0004_00

Which of the Following Causes Bone Matrix Resorption in Response