Opioid Drugs Exert Their Effects on Afferent Pain Pathways by Binding

question 3

Multiple Choice

Opioid drugs exert their effects on afferent pain pathways by binding to neuronal receptors that in turn:

• A)decrease transmitter release from presynaptic terminals.
• B)decrease excitability (hyperpolarization)in postsynaptic neurons.
• C)decrease production of endogenous chemicals known as catecholamines.
• D)all of the above
• E)A and B

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