The region at the junction of two proteins in a sarcomere is called:
Correct answer: A. A-band
- A. A-band
- B. Z-line
- C. H-zone
- D. M-line
Explanation
Z-line is the midline between I bands.H-zone is the lighter strip in the midsection of the A band.M-line bisects the H zone.A-band is situated on either side of the H zone of a muscle sarcomere, the area where contraction and relaxation of the muscle occurs, where sarcomeres overlap during muscle movements. Here both thick and thin filaments (actin and myosin) meet at the junction.
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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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