it may be concluded that greater responsiveness to serotonin of senescent beagle coronary arteries is due preferentially to increased function of serotonergic receptors rather than impaired function of the arterial endothelium responsible for the release of relaxing factor ( s ) , although some impairment of the function is supposed , on the basis of interferences with acetylcholine-induced relaxation in the aged beagle arteries .
C1179025
arterial endothelium
C0003842
arteries