2026/2027NR 546 MIDTERM EXAM COMPLETE 100
QUESTIONS AND CORRECT DETAILED ANSWERS
SECTION 1: NEUROANATOMY & NEUROBIOLOGY (Q1–40)
Q1. Which brain region governs speech production?
A. Wernicke's area
B. Broca's area
C. Amygdala
D. Thalamus
Answer: B
Rationale: Broca's area, located in the inferior frontal gyrus, governs speech production. A
lesion causes expressive aphasia with intact comprehension.
Q2. Damage to which brain region would most likely result in difficulty recognizing objects by
touch (astereognosis)?
A. Frontal lobe
B. Temporal lobe
C. Parietal lobe
D. Occipital lobe
Answer: C
Rationale: The parietal lobe processes somatosensory information, including stereognosis.
Astereognosis is a classic sign of anterior parietal damage.
Q3. Which brain structure is most associated with long-term memory formation?
A. Amygdala
B. Hypothalamus
C. Hippocampus
D. Thalamus
Answer: C
Rationale: The hippocampus is most associated with long-term memory formation and
consolidation. It is one of the first areas affected in Alzheimer's disease.
Q4. How does the orbitofrontal cortex (OFC) affect the amygdala?
A. Only inhibits the amygdala
B. Only activates the amygdala
,C. Both inhibits and activates the amygdala
D. Has no effect on the amygdala
Answer: C
Rationale: The OFC provides top-down regulation of emotional responses through its dual effect
on the amygdala—it both inhibits and activates this structure.
Q5. Which dopamine pathway is associated with positive symptoms of schizophrenia?
A. Mesocortical
B. Mesolimbic
C. Nigrostriatal
D. Tuberoinfundibular
Answer: B
Rationale: Excess dopamine activity in the mesolimbic pathway contributes to positive
symptoms such as hallucinations and delusions.
Q6. Which dopamine pathway blockade causes extrapyramidal symptoms (EPS)?
A. Mesolimbic
B. Mesocortical
C. Nigrostriatal
D. Tuberoinfundibular
Answer: C
Rationale: D2 blockade in the nigrostriatal pathway causes extrapyramidal symptoms.
Q7. Which dopamine pathway blockade causes hyperprolactinemia and galactorrhea?
A. Mesolimbic
B. Mesocortical
C. Nigrostriatal
D. Tuberoinfundibular
Answer: D
Rationale: D2 blockade in the tuberoinfundibular pathway raises prolactin, causing galactorrhea
and breast secretions.
Q8. Which neurotransmitter is the primary excitatory neurotransmitter and is described as
the "workhorse" of the brain?
A. GABA
B. Glutamate
C. Serotonin
D. Dopamine
,Answer: B
Rationale: Glutamate is the primary excitatory neurotransmitter. Too much glutamate is
associated with schizophrenia, epilepsy, and mania.
Q9. Which neurotransmitter is the primary inhibitory neurotransmitter?
A. GABA
B. Glutamate
C. Serotonin
D. Dopamine
Answer: A
Rationale: GABA decreases neuroexcitability across the brain. Too little GABA may lead to
anxiety or schizophrenia.
Q10. Serotonin is synthesized from which amino acid?
A. Tyrosine
B. Tryptophan
C. Glutamate
D. Histidine
Answer: B
Rationale: Serotonin (5-HT) is synthesized from tryptophan via tryptophan hydroxylase.
Q11. Dopamine is synthesized from which amino acid?
A. Tryptophan
B. Glutamine
C. Tyrosine
D. Phenylalanine
Answer: C
Rationale: Dopamine is synthesized from tyrosine, which is converted to L-DOPA and then to
dopamine.
Q12. The cell bodies of serotonergic neurons are primarily located in which brain region?
A. Substantia nigra
B. Locus coeruleus
C. Midline raphe nuclei of the brainstem
D. Ventral tegmental area
Answer: C
Rationale: Serotonergic cell bodies are located in the midline raphe nuclei of the brainstem.
, Q13. Which brain structure is considered the "pleasure center" of the brain?
A. Cortico-striatal-thalamic-cortical loop
B. Mesolimbic dopamine pathway
C. Mesocortical dopamine pathway
D. Nigrostriatal pathway
Answer: B
Rationale: The mesolimbic dopamine pathway projects from the VTA to the nucleus accumbens
and is considered the brain's pleasure and reward center.
Q14. Which statement correctly defines an antagonist effect?
A. Drug binds to receptor and produces maximal response
B. Drug binds to receptor but does not activate a response
C. Drug binds to receptor and produces partial response
D. Drug binds to receptor and produces inverse response
Answer: B
Rationale: An antagonist binds to the receptor but does not activate a response.
Q15. Which type of signal transduction cascade passes the message from a first receptor to a
second messenger?
A. Ion channel
B. G-protein linked
C. Tyrosine kinase
D. Nuclear receptor
Answer: B
Rationale: G-protein linked systems pass messages from a first receptor to a second messenger.
Q16. What is the function of the limbic system?
A. Speech comprehension
B. Emotion, learning, and memory formation
C. Motor coordination
D. Visual processing
Answer: B
Rationale: The limbic system includes the amygdala, hippocampus, and other structures that
process emotional responses and consolidate memories.
Q17. Which structure controls communication between the two brain hemispheres?
A. Central sulcus
B. Corpus callosum
QUESTIONS AND CORRECT DETAILED ANSWERS
SECTION 1: NEUROANATOMY & NEUROBIOLOGY (Q1–40)
Q1. Which brain region governs speech production?
A. Wernicke's area
B. Broca's area
C. Amygdala
D. Thalamus
Answer: B
Rationale: Broca's area, located in the inferior frontal gyrus, governs speech production. A
lesion causes expressive aphasia with intact comprehension.
Q2. Damage to which brain region would most likely result in difficulty recognizing objects by
touch (astereognosis)?
A. Frontal lobe
B. Temporal lobe
C. Parietal lobe
D. Occipital lobe
Answer: C
Rationale: The parietal lobe processes somatosensory information, including stereognosis.
Astereognosis is a classic sign of anterior parietal damage.
Q3. Which brain structure is most associated with long-term memory formation?
A. Amygdala
B. Hypothalamus
C. Hippocampus
D. Thalamus
Answer: C
Rationale: The hippocampus is most associated with long-term memory formation and
consolidation. It is one of the first areas affected in Alzheimer's disease.
Q4. How does the orbitofrontal cortex (OFC) affect the amygdala?
A. Only inhibits the amygdala
B. Only activates the amygdala
,C. Both inhibits and activates the amygdala
D. Has no effect on the amygdala
Answer: C
Rationale: The OFC provides top-down regulation of emotional responses through its dual effect
on the amygdala—it both inhibits and activates this structure.
Q5. Which dopamine pathway is associated with positive symptoms of schizophrenia?
A. Mesocortical
B. Mesolimbic
C. Nigrostriatal
D. Tuberoinfundibular
Answer: B
Rationale: Excess dopamine activity in the mesolimbic pathway contributes to positive
symptoms such as hallucinations and delusions.
Q6. Which dopamine pathway blockade causes extrapyramidal symptoms (EPS)?
A. Mesolimbic
B. Mesocortical
C. Nigrostriatal
D. Tuberoinfundibular
Answer: C
Rationale: D2 blockade in the nigrostriatal pathway causes extrapyramidal symptoms.
Q7. Which dopamine pathway blockade causes hyperprolactinemia and galactorrhea?
A. Mesolimbic
B. Mesocortical
C. Nigrostriatal
D. Tuberoinfundibular
Answer: D
Rationale: D2 blockade in the tuberoinfundibular pathway raises prolactin, causing galactorrhea
and breast secretions.
Q8. Which neurotransmitter is the primary excitatory neurotransmitter and is described as
the "workhorse" of the brain?
A. GABA
B. Glutamate
C. Serotonin
D. Dopamine
,Answer: B
Rationale: Glutamate is the primary excitatory neurotransmitter. Too much glutamate is
associated with schizophrenia, epilepsy, and mania.
Q9. Which neurotransmitter is the primary inhibitory neurotransmitter?
A. GABA
B. Glutamate
C. Serotonin
D. Dopamine
Answer: A
Rationale: GABA decreases neuroexcitability across the brain. Too little GABA may lead to
anxiety or schizophrenia.
Q10. Serotonin is synthesized from which amino acid?
A. Tyrosine
B. Tryptophan
C. Glutamate
D. Histidine
Answer: B
Rationale: Serotonin (5-HT) is synthesized from tryptophan via tryptophan hydroxylase.
Q11. Dopamine is synthesized from which amino acid?
A. Tryptophan
B. Glutamine
C. Tyrosine
D. Phenylalanine
Answer: C
Rationale: Dopamine is synthesized from tyrosine, which is converted to L-DOPA and then to
dopamine.
Q12. The cell bodies of serotonergic neurons are primarily located in which brain region?
A. Substantia nigra
B. Locus coeruleus
C. Midline raphe nuclei of the brainstem
D. Ventral tegmental area
Answer: C
Rationale: Serotonergic cell bodies are located in the midline raphe nuclei of the brainstem.
, Q13. Which brain structure is considered the "pleasure center" of the brain?
A. Cortico-striatal-thalamic-cortical loop
B. Mesolimbic dopamine pathway
C. Mesocortical dopamine pathway
D. Nigrostriatal pathway
Answer: B
Rationale: The mesolimbic dopamine pathway projects from the VTA to the nucleus accumbens
and is considered the brain's pleasure and reward center.
Q14. Which statement correctly defines an antagonist effect?
A. Drug binds to receptor and produces maximal response
B. Drug binds to receptor but does not activate a response
C. Drug binds to receptor and produces partial response
D. Drug binds to receptor and produces inverse response
Answer: B
Rationale: An antagonist binds to the receptor but does not activate a response.
Q15. Which type of signal transduction cascade passes the message from a first receptor to a
second messenger?
A. Ion channel
B. G-protein linked
C. Tyrosine kinase
D. Nuclear receptor
Answer: B
Rationale: G-protein linked systems pass messages from a first receptor to a second messenger.
Q16. What is the function of the limbic system?
A. Speech comprehension
B. Emotion, learning, and memory formation
C. Motor coordination
D. Visual processing
Answer: B
Rationale: The limbic system includes the amygdala, hippocampus, and other structures that
process emotional responses and consolidate memories.
Q17. Which structure controls communication between the two brain hemispheres?
A. Central sulcus
B. Corpus callosum
