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Related Experiment Videos

[Thermodynamic muscle cycles].

G V Gol'tsman

    Biofizika
    |March 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    Muscle contraction efficiency depends on temperature and entropy. Cycles are more advantageous at negative absolute temperatures with increased entropy, and positive absolute temperatures with decreased entropy, impacting muscle energetics.

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    Area of Science:

    • Thermodynamics
    • Muscle Physiology
    • Biophysics

    Context:

    • Muscle contraction is analyzed as a thermodynamic cycle.
    • The concept of non-equilibrium energy accumulation is applied.
    • Temperature-entropy relationships in biological systems are explored.

    Purpose:

    • To investigate the energetic advantages of muscle contraction cycles under different temperature-entropy conditions.
    • To explore the implications of non-equilibrium thermodynamics on muscle function.
    • To understand the role of ATPase activity nonlinearity in muscle efficiency.

    Summary:

    • Muscle thermodynamic cycles can be more energetically advantageous at negative absolute temperatures if entropy increases during redistribution.
    • Conversely, cycles are more favorable at positive absolute temperatures if entropy decreases.

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  • Non-linear ATPase activity creates a "Maxwell quasidemon" effect, enhancing overall muscle efficiency.

    • Impact:

    • Provides insights into the fundamental thermodynamic principles governing muscle contraction.
    • Suggests potential for optimizing biological energy conversion processes.
    • Highlights the complex interplay between temperature, entropy, and enzymatic activity in biological systems.