Hormones that help regulate blood calcium levels are produced by the? By: Sunday|Published on: Sep 5|Categories: 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 B can only donate blood to…The hormones produced in the hypothalamus are?The gland that releases hormones into the blood are…Which of the following organs regulates the levels…A person with blood group, O can be given blood from…SEE ALSO Which of the following is an agent of a sexually transmitted disease?