According to sliding filament theory, when muscle fibers are stimulated by nervous system, which of the following changes occurs?
Correct answer: A. I-bands shorten
- A. I-bands shorten
- B. Z-lines move further apart
- C. H-zone becomes more visible
- D. A-bands shorten
Explanation
According to sliding filament model of muscle contraction, the following changes can occur Z-lines come brought closer together.I-band shortens. H-zone disappears
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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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