Set point theory describes weight regulation around a genetically predetermined set point.

• A. Homeostasis
• B. Anorexia nervosa
• C. Set point theory
• D. Bulimia nervosa

Answer: (C)

The main idea here is how the body regulates weight around a genetically influenced target. Set point theory says each person has a biologically programmed weight range that the body tends to defend. When weight drifts away from that range, the body makes compensatory changes in hunger, appetite, and energy expenditure to push it back toward the set point. Genetics and hormonal signals help establish this target, so even with fluctuations in diet or activity, the system tends to steer you back to that range.

This differs from general homeostasis, which is about maintaining many internal conditions (temperature, pH, etc.) and isn’t specific to a weight-regulation mechanism. The other terms refer to eating disorders that describe patterns of behavior and pathology, not the regulatory mechanism by which weight is kept within a certain range. So the statement aligns with set point theory because it describes regulation of weight around a predetermined point.