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Amphibian muscle, skinned fibres, temperature, acclimation

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Thermal Dependence Of Maximal Ca2+-Activated Force In Skinned Muscle Fibres Of The Toad Bufo Marinus Acclimated At Different Temperatures, Bernard Rees May 1987

Thermal Dependence Of Maximal Ca2+-Activated Force In Skinned Muscle Fibres Of The Toad Bufo Marinus Acclimated At Different Temperatures, Bernard Rees

Biological Sciences Faculty Publications

Mechanically skinned muscle fibres from the twitch region of the iliofibularis muscle of cool- (16 +/- 1 degree C) and warm- (32 +/- 1 degree C) acclimated cane toads (Bufo marinus) were activated maximally by Ca2+ in solutions of different pH and at different temperatures (approx. 1-35 degrees C). Acclimation of up to 12 weeks at 16 degrees C and up to 8 weeks at 32 degrees C did not modify the marked thermal dependence of isometric force in the skeletal muscle fibres of the cane toad. The prominent decline of maximum Ca2+-activated force at lower temperatures, a property which …

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