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← Human Body & HealthDuring prolonged stress, what happens to synaptic neurotransmitter availability in the prefrontal cortex that impairs cognitive function?
A)Increased receptor recycling occurs quickly
B)Vesicle fusion rates remain constant
C)Reuptake transporter activity increases✓
D)Neurotransmitter synthesis enzymes are upregulated
💡 Explanation
Increased reuptake transporter activity removes neurotransmitters more quickly from the synaptic cleft, reducing their availability. Because of this reduced availability, the prefrontal cortex cannot sustain normal activity. Therefore, cognitive function is impaired, rather than enhanced by receptor changes.
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