Physics NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 9 PCB MCQ (Single Correct)

The overall blood calcium level depends on dietary calcium absorption, urinary calcium loss, calcium release from bone, and calcium uptake into tissues. Several factors regulate these processes. Which of the following does not play any role in regulating blood calcium level?

A
Vitamin D
B
Parathyroid hormone
C
Thyrocalcitonin
D
Thymosin

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The correct answer is:
D

Blood calcium homeostasis is regulated mainly by Vitamin D (calcitriol), Parathyroid hormone (PTH), and Calcitonin (thyrocalcitonin)-they control intestinal absorption, renal reabsorption, and bone resorption/deposition. Thymosin is a thymic hormone involved in T-cell maturation, not calcium regulation.

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