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:What is the probability of producing a child of…A person with blood group, O can be given blood from…In the electrolytic extraction of calcium from…During blood transfusion, agglutination could be…A sample of hard water contains some calcium…