Over lapping of thick filament occurs in:
Correct answer: A. A-Band
- A. A-Band
- B. M-line
- C. I-band
- D. Z-line
Explanation
The A-band is a region within a sarcomere, which is the basic functional unit of a muscle fiber. The A-band corresponds to the area where thick filaments (composed mainly of myosin) are found. It extends from one end of the thick filament to the other and includes the overlap between thick and thin filaments. The overlapping of thick filaments with thin filaments occurs within the A-band, making it the correct option.
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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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