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 person with blood group, O can be given blood from…What is the probability? of a man of blood group AB…What is the probability of producing a child of…Which of the following statements is correct of…A calcium atom and a calcium ion have the same?