Hormones that help regulate blood calcium levels are produced by the? by Sunday | Sep 5 | Biology JAMB | 0 comments A. Adrenal B. thyroid C. pancreas D. parathyroid Correct Answer: Option D – parathyroid Users Also Read These:A calcium atom and a calcium ion have the same?A cross between two parents produced four…Use arrows to show the route and direction of blood…An individual with blood group AB can receive blood…A sample of hard water contains some calcium…