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baroreceptors and chemoreceptors
transmits via vagus nerve to medulla
responds ONLY to increased BP
transmits via glossapharyngeal nerve to solitary nucleus of medulla
responds to increase and decrease in BP
carotid massage effect on HR
responds to decrease pO2, increase pCO2, and decrease blood pH
-carotid and aortic bodies
respond to changes in pH and pCO2 in brain interstitial fluid
HTN, bradycardia, respiratory depression
increase in ICP --> constricts arterioles
--> cerebral ischemia
--> HTN (sympathetic response)
--> reflex bradycardia
major stimulator of respiration in health people
major stimulator of respiration in pts with COPD
--> don't give too much O2!