Opioids produce an analgesic effect via which of the following mechanisms? A. Opioids increase the release of neurotrans

[answerhappygod]

Opioids produce an analgesic effect via which of the following
mechanisms?
A. Opioids increase the release of neurotransmitters by
increasing calcium influx into neurons.
B. Opioids decrease the release of neurotransmitters by a
G-protein mediated increase in adenylyl cyclase activation.
C. Opioids decrease the release of neurotransmitters by
decreasing Ca++ entry into the neuron.
D. Opioids decrease the transmission of pain by producing
postsynaptic excitation in the dorsal horn.
E. Opioids increase GABA release in limbic regions.