THYROID gland parathyroid gland ADRENAL gland both a and b
Solution :`Ca^(2+)` level in the body is controlled by both thyroid gland and pararthyroid gland. Thyroid gland secretes a hormone. THYROCALCITONIN which checks the excess BLOOD calcium levels. Parathyroid gland secretes hormone calle dprathyroid hormone or parathormone which INCREASE the `Ca^(2+)` levels in the blood.