A) controlling calcium level in blood
B) decreasing calcium level in blood
C) filteration in nephron
D) increasing absorption of water
Correct Answer: A
Solution :
Parathormone is secreted from parathyroid gland. It controls calcium level in blood through decreasing excretion of calcium and increasing absorption of \[C{{a}^{++}}\] in intestine. So parathormone maintains normal \[C{{a}^{++}}\] ions in blood and lowers the phosphate ions level. Calcitonin hormone is secreted from parafollicular cells of thyroid. It increases excretion of \[C{{a}^{++}}\] ion. So, calcitonin is antagonistic to parathormone.
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