One sarcomere is separated from the other by:
Correct answer: A. Z line
- A. Z line
- B. A band
- C. M line
- D. H zone
Explanation
A sarcomere is the contractile unit of the muscle. Thick and thin filaments in a sarcomere overlap during muscle contraction. The A band consists of thick filaments while the I band consists of thin filaments. Z-line traverses the middle of the I band, and from it, thin filaments extend in both directions. It marks the boundary of the sarcomere.
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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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