These changes result from combination of direct vascular effects of carbon dioxide and reflex changes in sympathetic and parasympathetic tone. ... Responses of carotid body chemosensory activity and ...

With ganglionic blockade, blood pressure decreased from 129±4.3/67±3.2 mm Hg to 94±4.5/52±2.2 mm Hg and the plasma norepinephrine concentration decreased from 190±27 pg/mL to 39±8.3 pg/mL ...