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Dependence of the time of relaxation to 50 % isometric contraction amplitude on the extent of stretching in trabecular (left panel) and papillary muscle (right panel) preparations. The points with bars show mean values and standard errors of the mean. The differences are significant (p < 0.05) between the groups: * - Pb vs. Cont; ^ - Pb + Cd vs. Cont; ^^ - Pb vs. Cd; ## - Pb + Cd vs. Cd.
