Which of the following statements is true of bulimia...

Which of the following statements is true of bulimia nervosa? a. People with bulimia continue to want to lose weight even when they are underweight. b. Bulimia is marked by weight fluctuations within or above normal ranges. c. Bulimia patients often come from middle-class families that are competitive, high-achieving, and protective. d. If one twin is diagnosed with bulimia, the chances of the other twin's sharing the disorder are greater if they are fraternal rather than identical twins.

Which of the following statements is true of bulimia nervosa?
a. People with bulimia continue to want to lose weight even when they are underweight.
b. Bulimia is marked by weight fluctuations within or above normal ranges.
c. Bulimia patients often come from middle-class families that are competitive, high-achieving, and protective.
d. If one twin is diagnosed with bulimia, the chances of the other twin's sharing the disorder are greater if they are fraternal rather than identical twins.

Key Concepts

Bulimia Nervosa Diagnostic Criteria

Bulimia nervosa is an eating disorder characterized by recurrent episodes of binge eating followed by inappropriate compensatory behaviors, such as self-induced vomiting, use of laxatives, or excessive exercise. It involves a preoccupation with body weight and shape, and the cycle of bingeing and purging distinguishes it from other eating disorders.

Typical Weight Patterns in Bulimia Nervosa

Unlike anorexia nervosa, individuals with bulimia nervosa usually have body weights that are within or above normal ranges. This concept is crucial because it highlights that despite engaging in extreme behaviors to control weight, those affected often do not exhibit the low body weight seen in other eating disorders.

Genetic Factors and Twin Studies in Eating Disorders

Research into the genetic underpinnings of eating disorders frequently employs twin studies to determine the heritability and concordance rates of disorders like bulimia nervosa. These studies generally show higher rates of shared disorders in identical twins compared to fraternal twins, suggesting a genetic predisposition.

Influence of Family Environment

Environmental factors, including family dynamics and socio-cultural pressures, play an important role in the development of eating disorders. While certain family characteristics such as high achievement expectations and competitiveness have been observed in some cases, they are part of a broader set of psychosocial influences contributing to bulimia nervosa.

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