Light and dark bands of muscles give the muscle cell as a whole its:
Correct answer: C. Striped appearance
- A. Strength
- B. Nourishment
- C. Striped appearance
- D. Protection
Explanation
Option C is correct.The light and dark bands of muscle cells give the muscle cell as a whole its striated appearance. The light bands, called I bands, are made up of thin filaments, while the dark bands, called A bands, are made up of thick filaments. The striated appearance of muscle cells is due to the arrangement of the thin and thick filaments. The thin filaments are attached to the Z discs, which are located at the ends of the I band. The thick filaments are attached to the M line, which is a protein structure that runs down the center of the A band
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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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