Endocrinology Quiz #8: Calcium Metabolism and Homeostasis

1. A 65-year-old woman presents with bone pain and constipation. Laboratory tests reveal elevated serum calcium, decreased serum phosphate, and elevated parathyroid hormone (PTH) levels. Which of the following is the most likely diagnosis? 

Question 1 of 5

2. A 30-year-old man with a history of chronic kidney disease presents with muscle cramps and paresthesias. Laboratory tests reveal low serum calcium and elevated serum phosphate levels. Which of the following is the most likely cause of his hypocalcemia? 

Question 2 of 5

3. Which of the following hormones increases serum calcium levels by stimulating osteoclast activity? 

Question 3 of 5

4. A 28-year-old woman presents with numbness and tingling around her mouth and in her fingers and toes. She recently underwent thyroidectomy for papillary thyroid cancer. Which of the following laboratory findings is most likely in this patient? 

Question 4 of 5

5. A 55-year-old man with a history of sarcoidosis presents with fatigue and weakness. Laboratory tests reveal hypercalcemia. Which of the following mechanisms is most likely responsible for his elevated calcium levels?

Question 5 of 5


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