The role of sweat in maintaining the stimulation of effort homeostasis in horses.
Sweat secretion was analyzed quantitatively and qualitatively in 20 horses after a 5 min. gallop at 450 m/min. The analysis revealed concentration of proteins 63.3 +/- 6.47 g/l, mainly albumins, a high level of sodium 254.43 +/- 62.84 mM/,l chloride 268.68 +/- 98.46 mM/l, potassium 98.95 +/- 49.62 mM/l and calcium 4.14 +/- 0.8 mM/l. A dependence was found between the protein concentration in serum and its quantity in sweat and between the level of potassium in sweat and its loss from the cells within a range 8.6 to 25.8 mM/l. The hypertonic horse sweat protects organism for excessive water loss, the loss taking place by imperceptible evaporation. The loss of body weight amounted to 5.64 +/- 2.36 kg and the loss with the sweat was only 1.56 kg. Besides its thermoregulation function, the sweat ensures a proper effort homeostasis-isoosmic and isoionic status.
Department and Clinic of Internal Diseases, Faculty of Veterinary Medicine, Agricultural University, Wrocław, Poland.
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Hejłasz
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Nicpoń
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D000818:Animals; D001798:Blood Proteins / Q000032:analysis* / Q000378:metabolism; D001833:Body Temperature Regulation; D001835:Body Weight; D002118:Calcium / Q000032:analysis / Q000097:blood; D002712:Chlorides / Q000032:analysis / Q000097:blood; D004573:Electrolytes / Q000032:analysis* / Q000097:blood; D006736:Horses / Q000502:physiology*; D005082:Physical Exertion; D011188:Potassium / Q000032:analysis / Q000097:blood; D012709:Serum Albumin / Q000032:analysis; D012964:Sodium / Q000032:analysis / Q000097:blood; D013542:Sweat / Q000737:chemistry / Q000378:metabolism*; D014882:Water-Electrolyte Balance
D001798:Blood Proteins; D002712:Chlorides; D004573:Electrolytes; D012709:Serum Albumin; D012964:Sodium; D011188:Potassium; D002118:Calcium