Calcium, during muscle contraction binds with?
Correct answer: B. Troponin C
- A. Tropomyosin
- B. Troponin C
- C. Troponin I
- D. Troponin T
Explanation
Correct option is B. Calcium is released from the sarcoplasmic reticulum through calcium ion channels when the membrane of the T-tubular system is excited. It binds to Troponin C causing it to conform, hence permitting the myosin head to latch onto the actin filament, onsetting muscle contraction.
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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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