title: Serum electrolyte and enzyme responses to heat stress and dehydration in the fowl (Gallus domesticus).
abstract: 1. Serum electrolytes, enzymes and various metabolites were determined in the hyperthermic and dehydrated fowl. 2. In normally-hydrated fowls, heat stress did not significantly affect blood constituents. 3. Water deprivation for 48 hr (dehydration) significantly (p less than 0.05) increased Na+, osmolality, SGPT and T3-retention. 4. During hyperthermic dehydration, Na+, Cl-, osmolality (p less than 0.01), BUN, glucose, T3-retention (p less than 0.02) and uric acid (p less than 0.001) significantly increased. 5. The present findings are consistent with the suggestion that changes in Na+/Ca2+ ratio might raise the hypothalamic thermoregulatory set-point and support our previous findings that acclimated fowls could efficiently regulate body temperature and acid-base status while avoiding extreme metabolic and enzymatic changes during heat exposure and dehydration.
mesh_terms: D000410:Alanine Transaminase / Q000097:blood*; D000469:Alkaline Phosphatase / Q000097:blood*; D000818:Animals; D001219:Aspartate Aminotransferases / Q000097:blood; D001798:Blood Proteins / Q000032:analysis; D001831:Body Temperature; D002645:Chickens; D003681:Dehydration / Q000097:blood*; D004573:Electrolytes / Q000097:blood*; D005334:Fever / Q000097:blood*; D006358:Hot Temperature; D007770:L-Lactate Dehydrogenase / Q000097:blood*; D013312:Stress, Physiological / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D001798:Blood Proteins; D004573:Electrolytes; D014284:Triiodothyronine; D007770:L-Lactate Dehydrogenase; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase; D000469:Alkaline Phosphatase