Identify the effects of amphetamines on dopamine levels in the brain. (Multiple select question)
a) Promote the release of dopamine from vesicles in presynaptic neurons
b) Prevent the release of dopamine from vesicles in presynaptic neurons
c) Stimulate the release of dopamine from vesicles in postsynaptic neurons
d) Promote an accumulation of dopamine in neural synapses
e) Stimulate uptake of dopamine from the synaptic cleft