PSY100H1 Chapter 9: chapter9.pdf

• School: UTSG
• Department: Psychology
• Course: PSY100H1
• Professor: Le Boutillier, Janelle

Document Summary

Psyb64 chapter 9: temperature regulation, thirst, and hunger. Homeostasis is the ability to adjust physiological processes to maintain a steady internal balance or equilibrium. To achieve homeostasis, regulatory systems actively defend certain set points for variables such as temperature, fluid levels, and weight. Deviations from the body"s ideal values are rapidly assessed by the nervous system which makes appropriate internal adjustments and motivates behavior designed to regain the ideal state: motivation activates and directs behavior. The nervous system activates behavior by generating tension and discomfort in the form of drive states such as thirst or hunger and those drive states disappear when the needs are met. Temperature regulations includes: set point, mechanisms for detecting a deviation from set point, and internal behavioral elements designed to regain set point. No matter where they live, animals must maintain an internal temperature that is ideal for the normal activity of their bodies" cells.