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Practice MCAT Question - Q106

When a neurotransmitter released from one neuron (pre-synaptic neuron) makes it more difficult for the next neuron (post-synaptic neuron) to depolarize, this phenomenon is called inhibition. What might be happening at the synapse to cause inhibition?

A.  The neurotransmitter causes extra Na+ to immediately enter the post-synaptic neuron.
B.  The neurotransmitter causes extra K+ to immediately enter the post-synaptic neuron.
C.  The neurotransmitter causes extra Na+ to immediately leave the post-synaptic neuron.
D.  The neurotransmitter causes extra K+ to immediately leave the post-synaptic neuron.


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