Correct Answer: B

Rationale: The correct answer is to monitor the client's electrolyte levels. In clients with anorexia nervosa, electrolyte imbalances can lead to serious, potentially life-threatening complications such as cardiac arrhythmias. Assessing body image perception (choice A) is important but not the priority when compared to monitoring electrolyte levels. Evaluating exercise habits (choice C) and assessing the client's relationship with her family (choice D) are also important aspects of care but do not take precedence over monitoring electrolyte levels in a client with anorexia nervosa.

Correct Answer: B

Rationale: The correct answer is B: 'Violent behavior.' When a client has overdosed on PCP, the nurse should be particularly cautious about the manifestation of violent behavior. PCP overdose can lead to aggressive and unpredictable actions, posing a significant risk to both the client and healthcare providers. Visual hallucinations (choice A), bizarre behavior (choice C), and loud screaming (choice D) can also occur with PCP overdose, but the primary concern should be the potential for violent behavior, making it the most critical behavior to monitor and manage.

Correct Answer: B

Rationale: The correct answer is to monitor the client's electrolyte levels. In clients with anorexia nervosa, electrolyte imbalances can lead to serious, potentially life-threatening complications such as cardiac arrhythmias. Assessing body image perception (choice A) is important but not the priority when compared to monitoring electrolyte levels. Evaluating exercise habits (choice C) and assessing the client's relationship with her family (choice D) are also important aspects of care but do not take precedence over monitoring electrolyte levels in a client with anorexia nervosa.

Correct Answer: A

Rationale: The correct answer is A. Recognizing and challenging negative thoughts is a fundamental aspect of cognitive-behavioral therapy (CBT). In this statement, the client demonstrates insight into the fact that their negative thoughts may not always be accurate, showing progress in reframing their thoughts. Choice B indicates some improvement in functioning but does not directly relate to the core principles of CBT. Choice C is concerning as abruptly stopping antidepressant medication can be detrimental to the client's well-being. Choice D reflects avoidance behavior, which is typically a target for intervention in CBT rather than a sign of positive progress.

Correct Answer: C

Rationale: The correct answer is C: Sun-downing syndrome. Sun-downing syndrome is a phenomenon commonly seen in individuals with dementia, where they exhibit increased confusion and agitation in the late afternoon or evening. This pattern of behavior is believed to be linked to disruptions in the circadian rhythm and can be triggered by factors such as fatigue, low lighting, or increased shadows during the evening. Choices A and B, anxiety and depression, may be comorbid conditions in individuals with dementia but are not the primary explanation for the symptoms described. While medication side effects (Choice D) should always be considered in a client with dementia, given the time-specific nature of the symptoms, sun-downing syndrome is the most likely explanation in this case.