Where is the neurotransmitter dopamine produced?
Thalamus
Amygdala
Substantia nigra and ventral tegmental area
Hippocampus
The Correct Answer is C
Choice A reason: The thalamus acts as a relay station for sensory and motor signals to the cerebral cortex. It does not produce dopamine.
Choice B reason: The amygdala is primarily involved in emotional processing, particularly fear and threat detection, but it is not a major site of dopamine production.
Choice C reason: The substantia nigra and ventral tegmental area are key dopaminergic nuclei in the brain. Dopamine neurons in the substantia nigra are involved in motor control pathways, while the ventral tegmental area is critical for reward, motivation, and reinforcement learning.
Choice D reason: The hippocampus is essential for memory formation and spatial navigation. Although dopamine modulates hippocampal activity, it is not produced there.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: While parental assistance may influence outcomes, framing it as “cheating” is inappropriate and may create unnecessary anxiety.
Choice B reason: ADOS evaluates a child’s social and communication abilities independently. Parents must leave so the examiner can observe the child’s behaviors without external influence, ensuring accurate assessment.
Choice C reason: Difficulty in observing the child is not the primary rationale; the goal is to evaluate independent behavior.
Choice D reason: Parental presence may affect behavior, but the main purpose is not to prevent upset, but to accurately assess skills independently.
Correct Answer is C
Explanation
Choice A reason: Lack of social engagement is more commonly associated with autism spectrum disorder and may be present in Rett syndrome, but it is not specific enough to distinguish between the two.
Choice B reason: Lack of imaginative play is also more typical in autism spectrum disorder and may not definitively point toward Rett syndrome.
Choice C reason: Deceleration of head growth (microcephaly) around 6 months is a hallmark feature of Rett syndrome, distinguishing it from autism spectrum disorder, which usually does not present with postnatal deceleration in head circumference.
Choice D reason: Lack of eye contact can be observed in autism spectrum disorder and is not unique to Rett syndrome, making it less useful for differential diagnosis.
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