Which of the following is true about skeletal muscle fibres?
Correct answer: C. The myoglobin content is high.
- A. Better adapted for slow sustained activities.
- B. For energy, they depend on fatty acids.
- C. The myoglobin content is high.
- D. Possess mitochondria in huge numbers.
Explanation
Option A is incorrect as smooth muscles are better adapted for slow sustained activity. Option B is incorrect as skeletal muscles primarily depend on glucose for energy. Option C is corrrect as skeletal muscles have a higher myoglobin content. Option D is incorrect because cardiac muscles have more mitochondria.
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About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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