Abstract
Publisher Summary This chapter discusses the relations between respiratory and circulatory control during gravitational load in man. It discusses a study for examining the influence of graded gravitational loads on the displacement of CO2-response curves to find a relation between circulatory and respiratory reactions under these conditions and for testing the hypothesis that the maintenance of homeostasis requires the magnitude of ventilation to depend on the flow of CO2 and/or O2 through the lungs during each interval of time. In the experiment, five healthy males aged between 25 and 45 years were investigated. From the study, it was found that gravitational load provoked a significant elevation of the heart rate. The arterial blood-pressure proved to be constant and diastolic pressure rose negligibly. The CO2-response curves shifted to the left depending on the changes in heart rate.
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