Q. The blood calcium level is lowered by the deficiency of
A) Calcitonin
B) Parathormone
C) Thyroxine
D) Both Calcitonin and Parathormone
Explanation
[Solution from source] Parathormone raises blood Ca²⁺ by mobilising it from bone and increasing reabsorption, so its deficiency causes hypocalcaemia. Calcitonin lowers blood calcium, so a lack of it would tend to raise the level. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.