Physiology General 60b83f73 Osteoclasts are inhibited by: A Parathyroid hormone B Calcitonin C 1,25-dihydroxycholecalciferol D Tumor necrosis factor High-Yield Explanation Calcitonin inhibits bone resorption by direct action on osteoclasts. Ref: Ganong's Review of Medical Physiology, 21st Edition, Page 397