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The authors studied the dynamics of osmoregulatory reactions of erythrocytes in load tests in vitro. It was found that frogs’ erythrocytes have no dependence between the stiffness of cell and its intensity of utilizing the membrane reserve in the mechanisms of volume regulation. The increase of stiffness under the influence of adrenaline was accompanied by the use of about 19% of membrane reserve by the cell in tests of osmotic load. The decrease of stiffness of erythrocytes under the influence of calcium load was accompanied by reduction of volume of the cell in hypotonic medium, and the cell did not participate in the process of volume regulation, however the nucleus used about 29% of reserve structures.

DYNAMICS OF OSMOREGULATION REACTIONS OF FROGS’ ERYTHROCYTES IN LOAD TESTS IN VITRO