BIOL-1507EL Chapter Notes - Chapter 39: Thyroid, Endocrine System, Pituitary Gland
19 Apr 2016
School
Department
Course
Professor
Document Summary
The tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. The homeostatic regulation of body temperature involves such mechanisms as sweating when the internal temperature becomes excessive and shivering to produce heat, as well as the generation of heat through metabolic processes when the internal temperature falls too low. A part of an organism that is typically self- contained and has a specific vital function, such as the heart or liver in humans. A group of organs that work together to perform one or more functions. Each does a particular job in the body, and is made up of certain tissues. A collection of extracellular molecules secreted by cells that provides structural and biochemical support to the surrounding cells. Endocrine, or ductless, glands (e. g. , pituitary, thyroid, adrenal) secrete substances known as hormones directly into the bloodstream rather than through ducts. A gland that secretes a substance out through a duct.
