A nurse is caring for an adolescent client who has a new diagnosis of schizophrenia. The client's parents are tearful and express feelings of guilt. Which of the following is an appropriate statement by the nurse?

Choice A rationale:

An anxiety reaction is the most appropriate explanation for the toddler's behavior of sitting quietly in the corner of the crib, sucking her thumb, and turning away from the nurse. These behaviors suggest that the toddler is experiencing anxiety due to the absence of her mother. Sucking the thumb is a common self-soothing mechanism in young children, and the behavior of turning away from the nurse can be seen as an attempt to cope with the separation.

Choice B rationale:

Resentment toward the mother is less likely in this context, as the toddler's behavior is more indicative of distress and anxiety related to separation from her mother rather than directed resentment.

Choice C rationale:

Developing autonomy is not the primary explanation for these behaviors. While developing autonomy is an important developmental milestone for toddlers, the described behavior is more suggestive of anxiety and coping with separation rather than a deliberate expression of autonomy.

Choice D rationale:

Regression refers to reverting to an earlier developmental stage in response to stress or difficulty. While regression can occur in response to hospitalization and separation from caregivers, the toddler's behavior of sitting quietly and sucking her thumb is better explained by anxiety than by regression to an earlier developmental stage.

The correct answer is Choice D

Choice A rationale: Metrorrhagia, or irregular uterine bleeding, is not typically associated with anorexia nervosa. Instead, amenorrhea is more common due to hypothalamic suppression from low body fat and caloric intake. The hypothalamus reduces gonadotropin-releasing hormone (GnRH), leading to decreased luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which suppresses ovulation and menstruation. Estrogen levels fall below normal (typically 30–400 pg/mL), disrupting endometrial stability. Thus, bleeding is less likely than complete menstrual cessation.

Choice B rationale: Tachycardia is not expected in anorexia nervosa; bradycardia is more common due to metabolic adaptation and reduced cardiac workload. The body conserves energy by lowering heart rate, often below 60 bpm. Malnutrition leads to decreased thyroid hormone (T3), reduced sympathetic tone, and myocardial atrophy. Electrolyte imbalances and hypovolemia further depress cardiac output. Tachycardia may occur in refeeding syndrome or acute stress, but chronically, the heart rate is typically slow due to adaptive mechanisms.

Choice C rationale: Hyperkalemia is rare in anorexia nervosa; hypokalemia is far more common due to purging behaviors, vomiting, and diuretic or laxative abuse. Potassium levels often fall below the normal range of 3.5–5.0 mEq/L. Losses through the gastrointestinal tract and renal excretion lead to muscle weakness, arrhythmias, and fatigue. Intracellular shifts during starvation also contribute to low serum potassium. Hyperkalemia may occur transiently during tissue breakdown or renal failure but is not a hallmark finding.

Choice D rationale: Constipation is a frequent finding in anorexia nervosa due to decreased caloric intake, slowed gastrointestinal motility, and reduced fiber consumption. Starvation suppresses parasympathetic activity, leading to delayed colonic transit. Electrolyte imbalances, especially hypokalemia, further impair smooth muscle contraction. Normal bowel frequency ranges from three times per week to three times per day; anorexic clients often fall below this due to systemic hypometabolism. Constipation may also be exacerbated by dehydration and laxative dependence.