prov:value
| - Chemicals such as substance P, histamine, prostaglandins, serotonin, and bradykinin are released transduction ??? ??? ??? substance p, histamine, prostaglandins, serotonin, and bradykin neurotransmitters that propagate a pain message, or action potential, along sensory afferent nerve fibers to the spinal cord ??? ??? ??? second set of neurotransmitters carry the pain impulse across the synaptic cl
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