Which of the following neurotransmitters and modulators are implicated in pain perception?
A. Opioid peptides
B. Substance P
C. Dopamine
D. Both A and B
E. All of the above
ANS: D
Rationale: Opioid peptides and substance P are linked to pain perception and modulation.
Health & Biomechanics
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Health & Biomechanics