effects of endogenous opioid peptides ( leucine5-enkephalin ; methionine5-enkephalin ; and beta-endorphin ) and morphine on isoleucine5-angiotensin ii ( all ) -stimulated increase in plasma vasopressin concentration , blood pressure and drinking behavior were characterized in conscious rats .
C0205753
endogenous opioid peptides
C0014298
enkephalin