to study this interaction , we selected the synapse between the splanchnic nerve and the chromaffin cells of adrenal medulla because the splanchnic nerve contains acetylcholine and neuropeptides ( multiple molecular forms of enkephalin-like peptides ) , while the membranes of chromaffin cells contain receptors for acetylcholine and opiate peptides .
C0027895
neuropeptides
C0205753
opiate