Muscles are composed of:
Correct answer: C. Groups of cell fibers
- A. Silica
- B. Polyester threads
- C. Groups of cell fibers
- D. Calcium and phosphorous
Explanation
Option (c) suggests that muscles are composed of groups of cell fibers. This statement is partly correct. Muscles are indeed composed of groups of muscle fibers. Muscle fibers are long, cylindrical cells that contain contractile proteins, actin, and myosin, responsible for muscle contraction. Multiple muscle fibers are bundled together to form muscle tissues, and different muscle tissues combine to make muscles.
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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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