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) Based on chemical structure, glucagon belongs to this class of hormones:
(2) Based on chemical structure, adrenocorticotropic hormone (ACTH) belongs to this class of hormones:
(3) Amine hormones, also referred to as amino acid-derived hormones, are synthesized from this amino acid:
(4) Paracrine signaling describes a mode of communication in which:
(5) Autocrine signaling describes a mode of communication in which: