A nursing instructor is teaching students about eating disorders. Which statement indicates that a student understands the difference between anorexia nervosa and bulimia nervosa?

Choice A reason: Hyperkalemia is not typically associated with anorexia nervosa. In fact, hypokalemia is more common due to vomiting or diuretic use. Hyponatremia may occur but is not a defining feature. This statement reflects confusion in electrolyte disturbances. Choice B reason: Malnutrition and dehydration are hallmark features of anorexia nervosa. These result from severe caloric restriction and fluid imbalance. This statement accurately reflects the physical consequences of the disorder and distinguishes it from bulimia, where weight may be normal or fluctuating. Choice C reason: Amenorrhea is more commonly associated with anorexia nervosa due to hormonal suppression from malnutrition. Parotid gland enlargement is a symptom of bulimia nervosa, caused by repeated vomiting. This statement mixes features of both disorders inaccurately. Choice D reason: While erosion of tooth enamel is a sign of bulimia nervosa due to gastric acid exposure from purging, hypotension and edema are more commonly seen in anorexia nervosa. This statement inaccurately attributes symptoms across disorders.