A chemical substance produced and secreted by endocrine (ductless) glands that travels through the bloodstream and controls or regulates the activity of another organ or group of cells - its target organ. (For example, growth hormone released by the pituitary gland controls the growth of long bones of the body.) There are two main types of hormones...
1. Pertaining to the interaction between the nervous system and glands that produce hormones 2. Relating to or involving cells that produce hormones in response to the stimulation of nerves or the nervous system
A condition in children resulting from excess growth hormone characterized by an abnormal growth of the long bones and increased size of feet and hands
Pea-sized gland located in the center of the head behind the sinus cavity at the base of the brain; the pituitary consists of two parts that produce different hormones: 1) in the anterior portion, growth hormone (GH), adrenocorticotropin (ACTH), thyroid-stimulating hormone (TSH), lutenizing hormone (LH), follicle-stimulating hormone (FSH), and...