PSY 220 Chapter Notes - Chapter 10: Scrotum, Pituitary Gland, Optic Chiasm
16 Sep 2018
School
Department
Course
Professor
Document Summary
Main ideas: many physiological and behavioral processes maintain a near constancy of certain body variables. They anticipate needs as well as react to them: mammals and birds maintain constant body temperature as a way of staying ready for rapid muscle activity at any temperature of the environment. Many brain peptides help regulate feeding and satiety. Every chemical reaction in a living body takes place in a water solution at a rate that depends on the identity and concentration of molecules in the water and the temperature of the solution. Our behavior is organized to keep the right chemicals in the right proportions and at the right temperature. Homeostasis (walter b. cannon 1929)- temperature regulation and other biological processes that keep body variables within a fixed range. Homeostatic processes in animals trigger physiological and behavioral activities that keep certain variables within a set range.
