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Gustatory perception of sour, sweet, and salt mixtures using parotid gland flow rate

Gustatory perception of sour, sweet, and salt mixtures using parotid gland flow rate Abstract The reflex secretion of parotid saliva was utilized to evaluate the stimulatory action of various taste mixtures on human gustatory chemoreceptors. Test solutions consisted of citric acid, sucrose, and sodium citrate. Rates of secretion were determined by measuring the volume produced by a standardized application procedure. The response elicited by the different solutions was determined. The effect of one modality upon another was then studied by combining two solutions at each of four concentrations. Results showed that the addition of citric acid or sodium citrate to sucrose produced a response equal to the sum of the separate constituents. The flow rate obtained from mixtures of citric acid and sodium citrate was less than the sum of the individual components. This apparently was due to the buffering effect causing a decreased hydrogen ion concentration. Although the hydrogen ion concentration decreased to sub-threshold levels, the salivary gland secretion rate was still responsive to variations in hydrogen ion concentration, indicating a synergistic effect when hydrogen and sodium ions were present in the same solution. gustation; taste; gustatory-salivary reflex; parotid gland secretion Submitted on October 1, 1964 Copyright © 1965 the American Physiological Society http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Physiology The American Physiological Society

Gustatory perception of sour, sweet, and salt mixtures using parotid gland flow rate

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Publisher
The American Physiological Society
Copyright
Copyright © 1965 the American Physiological Society
ISSN
8750-7587
eISSN
1522-1601
Publisher site
See Article on Publisher Site

Abstract

Abstract The reflex secretion of parotid saliva was utilized to evaluate the stimulatory action of various taste mixtures on human gustatory chemoreceptors. Test solutions consisted of citric acid, sucrose, and sodium citrate. Rates of secretion were determined by measuring the volume produced by a standardized application procedure. The response elicited by the different solutions was determined. The effect of one modality upon another was then studied by combining two solutions at each of four concentrations. Results showed that the addition of citric acid or sodium citrate to sucrose produced a response equal to the sum of the separate constituents. The flow rate obtained from mixtures of citric acid and sodium citrate was less than the sum of the individual components. This apparently was due to the buffering effect causing a decreased hydrogen ion concentration. Although the hydrogen ion concentration decreased to sub-threshold levels, the salivary gland secretion rate was still responsive to variations in hydrogen ion concentration, indicating a synergistic effect when hydrogen and sodium ions were present in the same solution. gustation; taste; gustatory-salivary reflex; parotid gland secretion Submitted on October 1, 1964 Copyright © 1965 the American Physiological Society

Journal

Journal of Applied PhysiologyThe American Physiological Society

Published: Nov 1, 1965

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