If a drug binds to a receptor, which normally triggers the opening of a Na⁺channel, causing it to open in the absence of neurotransmitter release, what is the most likely result? A) an increased number of IPSPs B) an increased number of EPSPs C) a prolonged hyperpolarization D) a decreased number of IPSPs E) a decreased number of EPSPs

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Quizplus · Accepted Answer

When a drug causes a sodium channel to open in the absence of neurotransmitter release, it mimics the action of excitatory neurotransmitters, leading to an influx of sodium ions into the neuron. This influx depolarizes the neuron, making it more likely to fire an action potential, thereby increasing the number of excitatory postsynaptic potentials (EPSPs).

If a Drug Binds to a Receptor, Which Normally Triggers