acetylcholine , dimethylphenylpiperazinium ( dmpp ) and methacholine , given in relatively small doses into the aorta proximal to the blood supply to the adrenal glands , caused a marked rise in perfusion pressure which was due to the release of catecholamines from the adrenal medulla.3 .
C0001625
adrenal glands
C0001629
adrenal medulla