the influence of naturally occurring opioid peptides ( met-enkephalin ( met-enk ) , dynorphin ( dyn ) , beta-endorphin ( beta-ep ) ) as well as morphine and the opiate antagonist naloxone and specific antisera on cerebral blood flow autoregulation was studied in anesthetized , artificially ventilated rats .
C0205753
opioid peptides
C0013355
dynorphin