cardiovascular responses to intravenous bolus doses of certain exogenous substances ( capsaicin , phenyldiguanide , cryptenamine , veratrine sulphate ) which act on chemoreceptors in the pulmonary or proximal arterial circulation were compared to the naturally occurring chemoreceptor agonist , leucineenkephalin ( leu5-enk ) in the conscious dog .
C0007226
cardiovascular
C0005775
circulation