How do red muscle fibers in animals work for longer periods without fatigue?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Answer:
Red muscle fibers contain:
- Myoglobin: A respiratory pigment that stores and transports large amounts of oxygen.
- High mitochondrial density: Enables sustained aerobic respiration.
- Slow ATP hydrolysis rate: Conserves energy.
- Rich capillary network: Ensures continuous oxygen supply.
These adaptations make red fibers fatigue-resistant and suitable for prolonged activity like maintaining posture.
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