Which neurotransmitter is primarily implicated in the development of schizophrenia?

Correct Answer: C

Rationale: The correct answer is dopamine. Dopamine dysregulation is a key factor in the development of schizophrenia. Excess dopamine activity in certain brain regions is associated with positive symptoms of schizophrenia, such as hallucinations and delusions. Dopaminergic medications that reduce dopamine levels are often used to manage these symptoms, further supporting the role of dopamine in schizophrenia. Serotonin (Choice A) is more commonly associated with mood regulation and is implicated in depression and anxiety disorders. Norepinephrine (Choice B) is involved in the body's 'fight or flight' response and is linked to conditions like anxiety and PTSD. Acetylcholine (Choice D) plays a role in muscle movement and memory but is not primarily implicated in schizophrenia.

Correct Answer: D

Rationale: Cognitive-behavioral therapy (CBT) is a widely used therapeutic approach effective in treating various mental health conditions. While CBT can be beneficial for different disorders, it is particularly well-suited for anxiety-related conditions like generalized anxiety disorder. CBT focuses on identifying and modifying negative thought patterns and behaviors contributing to anxiety, making it a suitable choice for treating generalized anxiety disorder. Therefore, the correct answer is D. Choices A, B, and C are incorrect because CBT is not typically the first-line treatment for schizophrenia, bipolar disorder, or posttraumatic stress disorder, although it may be used as a part of a comprehensive treatment plan.

Correct Answer: A

Rationale: The most appropriate therapeutic approach for a patient diagnosed with borderline personality disorder exhibiting self-harming behavior is dialectical behavior therapy (DBT). DBT is specifically designed to address the core symptoms of borderline personality disorder, including self-harming behaviors. It focuses on teaching patients skills to manage emotions, improve interpersonal relationships, and enhance distress tolerance. Psychoanalysis (Choice B) is not the most appropriate for immediate symptom management in this case. Supportive therapy (Choice C) may not provide the structured approach needed to address self-harming behaviors effectively. Pharmacotherapy (Choice D) may be used as an adjunct in some cases, but DBT is the frontline therapy for managing self-harming behaviors in borderline personality disorder.

Correct Answer: C

Rationale: Methylphenidate is a central nervous system stimulant often prescribed to manage symptoms of ADHD. It works by increasing the activity of certain neurotransmitters in the brain, helping to improve focus, attention, and impulse control in individuals with ADHD. Haloperidol, Sertraline, and Clozapine are not typically used as first-line treatments for ADHD. Haloperidol is an antipsychotic used in conditions like schizophrenia, Sertraline is an antidepressant primarily for mood disorders, and Clozapine is an atypical antipsychotic for treatment-resistant schizophrenia.

Correct Answer: C

Rationale: Paroxetine is a selective serotonin reuptake inhibitor (SSRI) commonly prescribed for obsessive-compulsive disorder due to its efficacy in managing OCD symptoms. While different SSRIs may be used based on individual patient response and tolerability, Paroxetine stands out as a well-established option for treating OCD. Fluoxetine (Choice A) is another SSRI commonly used for OCD, but Paroxetine is more commonly associated with this indication. Citalopram (Choice B) and Escitalopram (Choice D) are also SSRIs but are not typically the first choice for treating OCD.