Which of the following Slatements is not true?

A. Parathyroid hormone-related protein is responsible for causing hypercalcemia in cancer patients

B. The unionized fraction of calcium in the plasma is an impoant determinant of PTH secretion

C. Mg2+ influences PTH secretion in the same direction as Ca2+ but is a less potent secretagogue

D. Ca2+influences PTH secretion by acting on a calcium sensor G-protein coupled receptor located in the parathyroid gland

Correct Answer: The unionized fraction of calcium in the plasma is an impoant determinant of PTH secretion

Description: Ans. b. The unionized fraction of calcium in the plasma is an impoant determinant of PTH secretion"Circulating ionized calcium acts directly on the parathyroid glands in a negative feedback fashion to regulate the secretion of PTH."Magnesium is required to maintain normal parathyroid secretory responses. Impaired PTH release along with diminished target responses to PTH account fir the hypocalcaemia that occasionally occurs in magnesium deficiency

Category: Medicine

Share:

← Previous MCQ

Next MCQ →

Get More

Subject Mock Tests

Practice with over 200,000 questions from various medical subjects and improve your knowledge.

Attempt a mock test now

Mock Exam

Take an exam with 100 random questions selected from all subjects to test your knowledge.

Coming Soon

Get More

Subject Mock Tests

Try practicing mock tests with over 200,000 questions from various medical subjects.

Attempt a mock test now

Mock Exam

Attempt an exam of 100 questions randomly chosen from all subjects.

Coming Soon