Calcium45 Uptake and Turnover of Tendon Fibres as Influenced by Thermic Contraction and Age

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Abstract
Contraction which is strong at 65[degree]C leads to increased uptake of Ca45, which increases with temperature. There is no obvious relation between thermally engendered uptake and age, but older rat''s tendons retain more Ca45 if it is injected into intact animals. It is concluded that in aging collagen transformation occurs similarly as it does in thermic contraction and this probably accounts for the increased calcium retention by the connective tissue of the aging animal.