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The reflex bradycardia produced by a transient phenylephrine-induced rise of arterial pressure was investigated in man during rest and supine exercise, before and after autonomic blockade of the heart. Reflex bradycardia diminished proportionally to the tachycardia of exercise. Propranolol slowed the heart at rest and during exercise, but increased the(More)
Three men and three women were exposed to transients of air temperature (range, 16--48 degrees C). Whole-body sweating rate, local tissue heat flows, and O2 consumption in the cold were linearly related to a weighted sum of tympanic and mean skin temperatures, called "central drive," During changes in air temperature, changes in subjects' scaled estimates(More)