Where hormone regulates blood calcium levels?
Score: 4.5/5 (30 votes) Parathyroid hormone is secreted from four parathyroid glandsparathyroid glandsThe parathyroid glands lie just behind the thyroid glands in the neck. The parathyroid glands (light pink) produce parathyroid hormone, which increases levels of calcium in the blood. The parathyroi...