Endocrinology is defined as the study of how chemical messenger molecules, referred to as hormones, influence physiological processes. By definition, a hormone is a signaling molecule that is released into the bloodstream, where the hormone can then travel to distant target cells and tissues within the body. Along with the nervous system, the hormones of the endocrine system provide an important means by which information travels within the body. Test your basic knowledge of the endocrine system by taking this simple quiz.
(1) Which of the following is/are true?
(2) Unlike all other endocrine organs, hormone production within the thyroid gland takes place in the extracellular compartment.
(3) During thyroid hormone synthesis, the following protein is responsible for organification of iodide.
(4) During thyroid hormone synthesis, the following protein is responsible for coupling of iodotyrosine moieties to form iodothyronines.
(5) During thyroid hormone synthesis, each thyroglobulin molecule leads to the production of only one molecule of thyroid hormone (i.e., one T3 or one T4).