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Multiple Choice: Chapter 23 Opioid analgesics Question 1 Which of the following statements best describes the action of opioid analgesics? A Receptor antagonism – blocking the receptors that facilitate the transmission of pain up the spinal cord B Receptor agonism – stimulating the receptors that are normally stimulated by the body's own endorphins C Enzyme inhibition – preventing the creation of inflammatory mediators that lead to pain D Enzymic metabolism – actively breaking down inflammatory mediators that cause pain