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Lesson 3.3 – How do we decide when and how much to eat?

In Lesson 3.2 we discussed ‘fast’ and ‘slow’ metabolism, and arrived at the idea that a person’s metabolic rate does not lead to obesity, rather, obesity arises when caloric intake is not coupled to metabolic needs. Why then is it so hard for many people to regulate their weight? In this lesson we will explore the signals that regulate sensations of hunger and satisfaction, and we will spend the next two lessons relating these signals to appetite and obesity. We will also consider the possibility that overeating is a disease, because the reward pathways in the brain that provide powerful signals that drive us to eat are the same as those involved in substance abuse leading to drug addiction.

Teacher Prep

3.3 Classroom Materials

3.3 Alternative Approaches

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