The blood calcium level is lowered by the deficiency of
Thyroxine
Calcitonin
Parathormone
both 1 and 2
As we have learned
Hormone secreted by parathyroid glands -
The parathyroid glands secrete a peptide hormone called parathyroid hormone (PTH)
- wherein
The secretion of PTH is regulated by the circulating levels of calcium ions.