The Following Are Ways That Opioids Can Interupt Pain Signalling

Multiple Choice

The following are ways that opioids can interupt pain signalling except:

A) opioid receptors are found on pain fiber terminals.
B) activation of opioid receptors in the spinal cord inhibit the release of substance P.
C) endogenous opioid levels increase in periaqueductal gray.
D) neurons release endogenous opioids in the medulla.