NEET Biology question

The blood calcium level is lowered by the deficiency of

(A)ParathormoneCorrect
(B)Thyroxine
(C)Calcitonin
(D)Both (a) and (b)

Answer: (A)

Solution

Thyroxine has no direct, significant role in calcium homeostasis, so its deficiency does not characteristically lower blood calcium, ruling out (b) and (d); calcitonin itself lowers blood calcium, so its deficiency would tend

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Question ID VK-128806