Summary
Experiments were performed on white rats. It was demonstrated that overheating is connected with significant increase of permeability of blood capillaries in internal organs and in the brain to Akrikhin. Reflex processes play an important role here and the change of permeability depends on the functional condition of the organism.
Increase of permeability of lung capillaries, as well as other compensatory mechanisms takes place prior to increase of the body temperature. This, evidently, points to the adaptive role of this factor. After repeated overheating the increase of the vascular permeability is less than when it is done only once. This shows that the factor of permeability adapted itself to overheating.
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Sultanov, F.F. Effect on capillary permeability of single and repeated overheating of an organism. Bull Exp Biol Med 45, 322–325 (1958). https://doi.org/10.1007/BF00803339
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DOI: https://doi.org/10.1007/BF00803339