BISC306 Chapter Notes - Chapter 7: Posterior Pituitary, Pineal Gland, Thyroid

• School: University of Delaware
• Department: Biological Sciences
• Course: BISC306
• Professor: michael moore

Document Summary

Chemicals secreted by the cell/group of cells into the blood then to the target location. Only travels through the blood is the target cell is far away. Special ectohormones (has external target) that act to perform a physiological/behavioral response. Large group of substances that influence cell growth and division. Act locally as autocrine and paracrine signals. Hormones bind to target cell receptors and initiate biochemical response. This process is called the cellular mechanism of action. Signals must have limited duration for the body to respond in internal state. Packaged in secretory vesicles and stored in gland. Diffuse into cells and bind to intracellular receptors. 3 six carbon rings + 1 five carbon ring. Derived from one or two amino acids. The posterior pituitary gland does not produce hormones, but rather stores and secretes hormones produced by the hypothalamus. Hormones made in brain and transported to the posterior pituitary where they are released. Controlled by hormones released by the hypothalamus.