The thick filaments, in a myofibril of muscles, are made of _.
Correct answer: B. Myosin
- A. Myoglobin
- B. Myosin
- C. Actin
- D. Haemoglobin
Explanation
Option A, myoglobin, is a heme-containing protein found in muscles, that binds to oxygen, which it supplies to muscle tissue. Option B, myosin, is the correct answer as it forms thick filaments in a myofibril. Option C, actin, forms thin filaments in a myofibril. Option D, haemoglobin, is the heme-containing protein found in red blood cells and serves to carry oxygen within the blood.
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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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