• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Anorexia Nervosa and Bulimia Nervosa

Extracts from this document...


Anorexia Nervosa and Bulimia Nervosa People who suffer from anorexia nervosa try to lose weight by starvation, whereas those suffering from bulimia nervosa often binge eat (overeat) followed by purging themselves of what they have just consumed in order to maintain a constant weight. The age range from the two illnesses differ slightly, with those suffering from bulimia nervosa being of the age range, 16-40, and the majority of those suffering from anorexia nervosa being diagnosed between the ages of 13-18. The age range in obviously more varied in bulimia, though that is not to say that there are not cases of anorexia in a more diverse age group. In addition, the consequences of the two conditions affect different factors of the individual. Studies have found anorexia being the main cause of considerable amounts of reduced grey matter in weight-recovered patients. Anorexia patients are also more likely to die from starvation, suicide or organ malfunction than Bulimics. ...read more.


was thirty female twins (16 MZ and 14 DZ pairs), four male twin pairs and one set of male triplets. The findings on this case were that there was a higher concordance rate in monozygotic female twins (55%) in comparison to the 7% of dizygotic female twins. Although approximately nine of the female co-twins did not suffer from any sort of disorder, it was found that five of the non-anorexic female co-twins suffered from either other psychiatric illnesses or minor eating disorders. In terms of the male twins (or triplets) none of them had anorexia and was therefore, discordant, though an interesting find was that the anorexic male of the twins appeared to have been disadvantaged at birth and to be the less dominant of the pairs. The conclusion appeared to be in favour of a genetic link to developing anorexia, considering the high concordance rate in twins with 100% of the same genes. ...read more.


Though privacy should be provided, it is valuable to have information such as age and ethnicity as part of this experiment. It is said that approximately 1% of schoolgirls and university students suffer from anorexia in the UK alone, and so the high concordance rate of the monozygotic twins could be explained by perhaps the majority of the monozygotic twins belonging to this age range, therefore, the likelihood of the findings would be more in favour to higher concordance. Likewise, the lower concordance rate in the dizygotic twins could be explained by there being less pairs coming from this age range. Ethnicity is also a slight factor in the probability of contracting the illness. It was shown that the rates of anorexia is most prevalent in Caucasian women. The effects of this information is similar to age, where if the pairs of twins were mostly of Caucasian ethnicity, the percentage of higher concordance would most likely be more prominent than if they were of mixed ethnicities. Lena Tran: PSY7 [EMA] ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Height and Weight of Pupils and other Mayfield High School investigations section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Height and Weight of Pupils and other Mayfield High School investigations essays

  1. Is there a link

    This indicates that there is little, if any, skewness in the data. When the distribution of data is not symmetrical, it is known as a skew distribution. If the tail of the distribution extends in the direction of the positive axis, then the distribution is positively skewed and in the other direction negatively skewed.

  2. The purpose of this research paper is to present our findings on how the ...

    However, their performance in subjects such as English Language and Spanish has been below that of females. Findings Considering Victor Vroom's theory of expectancy it has been found that underperformance of males in the CXC examinations occurs due to the fact that males do not see the importance and attractiveness

  1. Investigation into the shapes of limpets on sheltered and exposed rocky shores.

    The hydrolysis of ATP yields 30.5 kJ of energy that can be used in active transport, locomotion, and anabolism - the synthesis of complex molecules from simpler ones under enzyme action. Therefore, primary consumers found on sheltered shores can synthesise more ATP than their counterparts on exposed shores where there is less algae.

  2. An eating disorder is a serious disruption of a persons eating habits, it some ...

    As the twins will be raised in the same environment, similarity may be due to nature or nurture. However, if the identical twins are more similar, it implies that genes play a bigger role. Procedures 45 pairs of female twins were interviewed, in which atleast one twin had anorexia.

  1. Multiple Personality Disorder

    These people usually deny what is happening and may live their lives without anyone finding out about their disorder. The degree of vulnerability of the child has a great impact on the amount of personalities the person will have. The typical female multiple has about 19 personalities; male multiples tend to have less that half of that.

  2. What Is Anorexia? What Is Bulimia? How Are the Two Similare, If They Are, ...

    and may alternate with compulsive exercise and fasting. The symptoms can develop at any age from early adolescence to 40, but usually become clinically serious in late adolescence. Bulimia is not as dangerous to health as anorexia, but it has many unpleasant physical effects, including fatigue, weakness, constipation, fluid retention

  1. In this essay, I will be describing, comparing and explaining the two psychological diseases, ...

    The monozygotic (identical) twins were more likely to both suffer from the same eating disorder than those with dizygotic twins do. AN and BN can be explained using any of the four models, the biological model, the psychodynamic model, the behavioural model and the cognitive model.

  2. There are several different theories about the causality and development of bulimia

    This process eventually increases and usually leads to binging behaviours and the subsequent development of Bulimia. A further possible biological cause may be differences in metabolic rate. Devlin et al measured the resting metabolic rate of a group of 22 women of normal body weight with bulimia nervosa and in 19 age, sex, and weight-matched control subjects.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work