A drug increases the number of calcium ion channels that open in the presynaptic membrane when an impulse arrives.
Predict and explain the effect of this drug on the amount of neurotransmitter released at the synapse.
[2]
Predict the effect of this drug on the postsynaptic neurone.
[2]
Suggest why this drug has no effect on a synapse whose presynaptic neurone is not being stimulated.
[1]