MD Psychiatry and Behavioral Science 3

Question 1

A 28-year-old man spends 3 hours daily washing his hands due to contamination fears and recognizes the behavior as excessive and irrational. What is the first-line treatment?

Accepted Answer

CBT with exposure and response prevention plus an SSRI

Answer

Benzodiazepines

Answer

Atypical antipsychotics alone

Answer

Electroconvulsive therapy

Question 2

Which of the following is a core diagnostic feature required for a diagnosis of Autism Spectrum Disorder (ASD) according to DSM-5?

Accepted Answer

Persistent deficits in social communication and restricted, repetitive behaviors

Answer

Below-average intellectual functioning

Answer

Onset of all symptoms after age 3

Answer

Language regression as the presenting symptom

Question 3

A 55-year-old woman lost her husband 4 months ago. She feels sad and misses him but still enjoys family gatherings, functions at work, and has no hopelessness or suicidal ideation. What is the most accurate diagnosis?

Accepted Answer

Normal bereavement

Answer

Major depressive disorder

Answer

Persistent depressive disorder

Answer

Prolonged grief disorder

Question 4

Which mechanism best describes how selective serotonin reuptake inhibitors (SSRIs) exert their antidepressant effect?

Accepted Answer

Inhibit the serotonin transporter at the presynaptic terminal, increasing synaptic serotonin concentration

Answer

Block presynaptic alpha-2 receptors to increase norepinephrine and serotonin release

Answer

Irreversibly inhibit monoamine oxidase enzymes A and B

Answer

Block postsynaptic 5-HT2A receptors to reduce serotonin side effects

Question 5

A 6-year-old girl refuses to go to school because of excessive worry that something bad will happen to her mother while she is away. She has had nightmares about losing her mother. These symptoms have persisted for 5 weeks. What is the most likely diagnosis?

Accepted Answer

Separation Anxiety Disorder

Answer

Generalized Anxiety Disorder

Answer

Social Anxiety Disorder

Answer

Selective Mutism

Question 6

An 80-year-old man develops acute onset confusion, inattention, and fluctuating consciousness over 48 hours following elective hip replacement surgery. His family reports no prior cognitive issues. What is the most likely diagnosis?

Accepted Answer

Delirium

Answer

Dementia with Lewy bodies

Answer

Alzheimer's disease

Answer

Vascular dementia

Question 7

A 32-year-old man with alcohol use disorder is motivated to maintain abstinence. Which FDA-approved medication reduces alcohol cravings by blocking opioid receptors involved in alcohol's rewarding effects?

Accepted Answer

Naltrexone

Answer

Disulfiram

Answer

Methadone

Answer

Buprenorphine