Test Bank for Kaplan & Sadock's Synopsis
of Psychiatry: Behavioral
Sciences/Clinical Psychiatry 12th Edition
by Sadock, Sadock & Ruiz | Questions
and Answers 2027
PART 1: FOUNDATIONS — NEURAL SCIENCES &
NEUROBIOLOGY (Questions 1-35)
1. Which neurotransmitter is most implicated in the reward pathway and is central
to the pathophysiology of substance use disorders?
• A. Serotonin
• B. Norepinephrine
• C. Acetylcholine
• D. Dopamine
• E. Glutamate
Rationale: Dopamine is the primary neurotransmitter of the mesolimbic reward
pathway, originating in the ventral tegmental area and projecting to the nucleus
accumbens. Substance use disorders are characterized by dysregulation of this
dopaminergic circuit, leading to reinforcement of drug-seeking behavior .
,2. The blood-brain barrier is primarily maintained by which cell type?
• A. Microglia
• B. Oligodendrocytes
• C. Neurons
• D. Astrocytes
• E. Ependymal cells
Rationale: Astrocytes send projections called end-feet that wrap around capillary
endothelial cells, providing structural and functional support to the blood-brain barrier.
They regulate the tight junctions between endothelial cells that restrict passage of
substances into the brain .
3. Which lobe of the brain is primarily responsible for executive functioning and
personality?
• A. Temporal lobe
• B. Parietal lobe
• C. Occipital lobe
• D. Limbic lobe
• E. Frontal lobe
Rationale: The frontal lobe, particularly the prefrontal cortex, governs executive
functions such as planning, decision-making, impulse control, and personality
expression. Damage to this area produces characteristic personality changes, as
illustrated by the case of Phineas Gage .
,4. Long-term potentiation (LTP), the cellular basis of memory, primarily involves
which receptor?
• A. GABA-A receptor
• B. Dopamine D2 receptor
• C. Muscarinic receptor
• D. NMDA receptor
• E. Serotonin 5-HT2A receptor
Rationale: NMDA (N-methyl-D-aspartate) receptors are voltage-gated and ligand-
gated ion channels that play a critical role in synaptic plasticity and LTP. Their activation
allows calcium influx, triggering intracellular signaling cascades that strengthen synaptic
connections underlying memory formation .
5. Which neurotransmitter is synthesized from tryptophan?
• A. Dopamine
• B. Norepinephrine
• C. Acetylcholine
• D. GABA
• E. Serotonin
Rationale: Serotonin (5-hydroxytryptamine) is synthesized from the essential amino
acid tryptophan via the intermediate 5-hydroxytryptophan. This pathway is relevant to
depression treatment, as SSRIs enhance serotonergic neurotransmission by blocking
reuptake .
, 6. The hypothalamus-pituitary-adrenal (HPA) axis is most dysregulated in which
psychiatric condition?
• A. Bipolar I disorder
• B. Schizophrenia
• C. Obsessive-compulsive disorder
• D. Major depressive disorder
• E. Autism spectrum disorder
Rationale: Major depressive disorder is associated with chronic HPA axis
hyperactivation, elevated cortisol levels, and failure of the dexamethasone suppression
test. Hypercortisolemia leads to hippocampal atrophy, contributing to cognitive
symptoms and memory impairment in depression .
7. Which brain structure serves as the primary relay station for sensory
information to the cortex?
• A. Hypothalamus
• B. Hippocampus
• C. Thalamus
• D. Amygdala
• E. Basal ganglia
Rationale: The thalamus acts as the primary relay and integration center for sensory
and motor signals traveling between the brain and the body, directing information to
the appropriate cortical areas .
8. Which neurotransmitter is synthesized from tyrosine?
of Psychiatry: Behavioral
Sciences/Clinical Psychiatry 12th Edition
by Sadock, Sadock & Ruiz | Questions
and Answers 2027
PART 1: FOUNDATIONS — NEURAL SCIENCES &
NEUROBIOLOGY (Questions 1-35)
1. Which neurotransmitter is most implicated in the reward pathway and is central
to the pathophysiology of substance use disorders?
• A. Serotonin
• B. Norepinephrine
• C. Acetylcholine
• D. Dopamine
• E. Glutamate
Rationale: Dopamine is the primary neurotransmitter of the mesolimbic reward
pathway, originating in the ventral tegmental area and projecting to the nucleus
accumbens. Substance use disorders are characterized by dysregulation of this
dopaminergic circuit, leading to reinforcement of drug-seeking behavior .
,2. The blood-brain barrier is primarily maintained by which cell type?
• A. Microglia
• B. Oligodendrocytes
• C. Neurons
• D. Astrocytes
• E. Ependymal cells
Rationale: Astrocytes send projections called end-feet that wrap around capillary
endothelial cells, providing structural and functional support to the blood-brain barrier.
They regulate the tight junctions between endothelial cells that restrict passage of
substances into the brain .
3. Which lobe of the brain is primarily responsible for executive functioning and
personality?
• A. Temporal lobe
• B. Parietal lobe
• C. Occipital lobe
• D. Limbic lobe
• E. Frontal lobe
Rationale: The frontal lobe, particularly the prefrontal cortex, governs executive
functions such as planning, decision-making, impulse control, and personality
expression. Damage to this area produces characteristic personality changes, as
illustrated by the case of Phineas Gage .
,4. Long-term potentiation (LTP), the cellular basis of memory, primarily involves
which receptor?
• A. GABA-A receptor
• B. Dopamine D2 receptor
• C. Muscarinic receptor
• D. NMDA receptor
• E. Serotonin 5-HT2A receptor
Rationale: NMDA (N-methyl-D-aspartate) receptors are voltage-gated and ligand-
gated ion channels that play a critical role in synaptic plasticity and LTP. Their activation
allows calcium influx, triggering intracellular signaling cascades that strengthen synaptic
connections underlying memory formation .
5. Which neurotransmitter is synthesized from tryptophan?
• A. Dopamine
• B. Norepinephrine
• C. Acetylcholine
• D. GABA
• E. Serotonin
Rationale: Serotonin (5-hydroxytryptamine) is synthesized from the essential amino
acid tryptophan via the intermediate 5-hydroxytryptophan. This pathway is relevant to
depression treatment, as SSRIs enhance serotonergic neurotransmission by blocking
reuptake .
, 6. The hypothalamus-pituitary-adrenal (HPA) axis is most dysregulated in which
psychiatric condition?
• A. Bipolar I disorder
• B. Schizophrenia
• C. Obsessive-compulsive disorder
• D. Major depressive disorder
• E. Autism spectrum disorder
Rationale: Major depressive disorder is associated with chronic HPA axis
hyperactivation, elevated cortisol levels, and failure of the dexamethasone suppression
test. Hypercortisolemia leads to hippocampal atrophy, contributing to cognitive
symptoms and memory impairment in depression .
7. Which brain structure serves as the primary relay station for sensory
information to the cortex?
• A. Hypothalamus
• B. Hippocampus
• C. Thalamus
• D. Amygdala
• E. Basal ganglia
Rationale: The thalamus acts as the primary relay and integration center for sensory
and motor signals traveling between the brain and the body, directing information to
the appropriate cortical areas .
8. Which neurotransmitter is synthesized from tyrosine?
