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← Human Body & HealthWhat causes long-term potentiation (LTP) at a glutamatergic synapse during associative learning?
A)Increased sodium channel inactivation
B)Co-activation of NMDA receptors✓
C)Decreased presynaptic neurotransmitter release
D)Retrograde endocannabinoid signaling inhibition
💡 Explanation
LTP, a form of synaptic plasticity, requires co-activation of NMDA receptors by glutamate and postsynaptic depolarization because magnesium block is removed, therefore calcium influx triggers intracellular signaling cascades that strengthen the synapse, rather than inhibition or changes to sodium channels.
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