The repeated protein pattern of myofibrils is called:
Correct answer: A. Sarcomere
- A. Sarcomere
- B. Sarcolemma
- C. Zyomere
- D. Cross bridges
Explanation
A sarcomere is the basic functional unit of a muscle. It is the repeating unit within myofibrils, which are thread-like structures found in muscle cells. Sarcomeres are responsible for muscle contraction. They consist of overlapping filaments of actin and myosin, which slide past each other during muscle contraction, leading to the shortening of the sarcomere and the overall contraction of the muscle.
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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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