After reading this chapter, you will be able to:

• Summarize the psychological theories of motivation.
• Describe how temperature regulation and thirst reflect the concept of homeostasis.
• Explain the role of taste in choices of food.
• Identify the brain signals that control when we begin and end eating.
• Compare the roles of environment and heredity in risk for obesity.
• Examine how the environment and genetics impact risk for disordered eating.
• Discuss the role of neurotransmitters in eating disorders.