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[The oxygen diffusion coefficient in isolated skeletal muscle fibers]
Fiziologicheskii Zhurnal SSSR Imeni I. M. Sechenova
|July 1, 1991
Summary
Oxygen diffusion in muscle fibers is slower than in water for various species. This oxygen transport property changes during development, particularly in chickens.
Area of Science:
- Physiology
- Biophysics
- Comparative Biology
Context:
- Understanding oxygen transport is crucial for cellular respiration and tissue function.
- Skeletal muscle fibers present unique diffusion challenges compared to aqueous environments.
- Comparative analysis across species (Baikal seal, grayling, rat, chicken) provides insights into evolutionary adaptations.
Purpose:
- To determine and compare oxygen diffusion coefficients in isolated skeletal muscle fibers.
- To investigate the relationship between oxygen consumption, partial pressure, and fiber radius.
- To analyze developmental changes in oxygen diffusion during embryogenesis and postnatal growth in chickens.
Summary:
- Oxygen diffusion coefficients were calculated for skeletal muscle fibers of Baikal seal, grayling, white rat, and chicken.
- In all studied species, oxygen diffusion was less efficient within muscle fibers compared to water.
- The oxygen diffusion coefficient increased significantly during chicken development.
Impact:
- Highlights the physiological constraints on oxygen diffusion within muscle tissue.
- Provides quantitative data for models of cellular oxygen transport.
- Suggests developmental plasticity in oxygen transport mechanisms within skeletal muscle.