This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Osteoclast has specific receptor for : \nSelect and explain. \nA. Parathyroid hormone., B. Calcitionin., C. Thyroxin., D. Vit D3.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. CalcitoninCalcitonin exes its Ca2+ lowering effect by inhibiting bone resorption. This action is direct and calcitonin inhibits the activity of osteoclase 2. It also increases Ca2+ excretion in urine.HormonesBone cells on which theirreceptors are presentCalcitoninOsteoclastQParathyroidOsteoblastQVitamin DOsteoblastQCalcitonin exes its Ca2+ lowering effect by inhibiting bone resorption. This action is direct and calcitonin inhibits the activity of osteoclase 2. It also increases Ca2+ excretion in urine.', 'role': 'assistant'}]