Question

question 12
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which of the following cells is inhibited by increased calcitonin levels in the blood?
osteogenic cell
osteocyte
osteoclast
osteoblast

Explanation:

Calcitonin is a hormone that plays a role in regulating calcium levels in the blood. Osteoclasts are cells that break down bone tissue, releasing calcium into the bloodstream. When calcitonin levels increase, it inhibits the activity of osteoclasts. This inhibition reduces bone resorption (breakdown), which helps lower blood calcium levels. Osteogenic cells are related to bone formation (osteoblasts come from them), osteocytes are mature bone cells involved in maintaining bone matrix, and osteoblasts build bone (not directly inhibited by calcitonin in the context of the main calcium - regulating effect related to the question).

Answer:

Osteoclast