Effect of plasma volume on thermoregulation in the dog
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Panting thresholds, plasma volume (PV) changes and cardiac filling pressure were studied during thermal dehydration in control, water deprived (WD) and hypovolemic (PEG) dogs. WD and PEG dogs showed a delayed panting threshold, apparently due to hypovolevoia. Initiation of heat stress however resulted in a transient plasma expansion in all dogs. Cardiac filling pressure did not change.
Key wordsHeat stress Hypohydration Panting threshold Plasma volume Cardiac filling pressure
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- 1.Greenleaf, J.E., van Beaumont, W., Brock P., Morse, J.T., Mongseth, G.R. (1979). Plasma volume and electrolyte shifts with heavy exercise in sitting and supine positions.Am.J. Physiol. 236:R206–R214.Google Scholar
- 2.Horowitz, M. and Samueloff, S. (1979) Plasma water shifts during thermal dehydration.J. Appl. Physiol. 47:738–744.Google Scholar
- 3.Nadel, E.R. (1980) Circulatory and thermal regulations during exercise.Fed. Proc. 39: 1491–1497.Google Scholar
- 4.Madel, E.R., S.A., Portney & C.B. Wenger (1980) Effect on hydration state on circulatory and thermal regulations.J. Applied Physiol. 49:716–722.Google Scholar
- 5.Senay, L.C. (1979). Temperature regulation and hypohydration. A singular view.J. Appl. Physiol. 47:1–7.Google Scholar
- 6.Taylor, C.R. (1970) Dehydration and heat. Effects on temperature regulation of East African ungulates.Am. J. Physiol. 219: 1131–1135.Google Scholar