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Fig. 2. Effects of (A) acetylcholine (ACh) and (B) dopamine (DA) on arterial
pressure in each of the anterior median artery (AMA), anterior lateral artery
(ALA) and fifth lateral artery (LA5) preparations without heartbeat (see
Materials and methods). Arterial pressure of LA5 was decreased by perfusion
with serotonin (5-HT) to accentuate the effects of ACh on pressure of the
artery. Bars represent periods of agent application. It was confirmed that an
agent solution reached the preparation in approximately 30 s after the start
of perfusion.