Assertion: adrenal medulla's cell | /r/HasProperty | innervated by enkephalin-containing peptides
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Source sentences:
text: Chromaffin cells of the adrenal medulla are innervated by the splanchnic nerve and secrete adrenaline (epinephrine), noradrenaline (norepinephrine), some dopamine, enkephalin and enkephalin-containing peptides, and a few other hormones into the blood stream.