Calcium ions released during a muscle fiber contraction attach with:
Correct answer: D. Troponin
- A. Myosin
- B. Actin
- C. Tropomyosin
- D. Troponin
Explanation
Calcium ions which are released bond to troponin, which in turn allows the tropomyosin to give way, thus allowing the muscle to stay contracted.
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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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