Vitamin D and Calcium Metabolism — MCQs

Calcium absorption is affected by-

Active form of Vitamin D is:

A 30-year-old woman is presented to ER with complaints of progressive lethargy, constipation, muscle weakness, and increased thirst and urination. On fuher asking, the patient admits taking large doses of vitamin and mineral supplements on a daily basis. The most likely metabolic abnormality causing patient's symptoms are also seen in which of the following clinical conditions?

Secondary hyperparathyroidism due to Vit D deficiency shows :

Which of the following is seen in sarcoidosis

A patient is on a low calcium diet for 8 weeks. Which of the following increases to maintain serum calcium levels?

Which of the following organs are involved in the synthesis and activation of vitamin D?

Which of the following causes hypocalcemia:

Which of the following vitamins can be synthesized in the body in sufficient quantities to meet physiological needs?

A patient is found to have elevated levels of methylmalonic acid. This finding suggests a deficiency in which vitamin?