You will have studied one of the following disorders: - anorexia nervosa - Obsessive-compulsive disorder - unipolar depression - AQA - A-Level Psychology - Question 5 - 2018 - Paper 2

Anorexia nervosa is often explained through biological factors, particularly genetic predisposition and neurobiological abnormalities.

Genetic Factors

Research indicates that individuals with anorexia nervosa often have a familial history of the disorder, suggesting a genetic component. Studies, including twin studies, show that identical twins have a higher concordance rate for anorexia compared to fraternal twins, indicating that genes play a significant role in the likelihood of developing the disorder.

Neurotransmitter Imbalances

Another biological explanation involves the role of neurotransmitters such as serotonin and dopamine. Individuals with anorexia may have altered levels of these neurotransmitters, affecting mood and appetite regulation. Higher levels of serotonin, for example, may lead to increased feelings of anxiety, which can exacerbate restrictive eating behaviors.

Conclusion

In conclusion, the biological explanation for anorexia nervosa highlights the interplay of genetics and neurochemistry in the development of this complex disorder. While biological factors are significant, they must be considered alongside psychological and environmental influences for a comprehensive understanding of anorexia nervosa.