Thin filaments have a diameter of:
Correct answer: C. 7-8 nm
- A. 1-2 µm
- B. 10-60 µm
- C. 7-8 nm
- D. 16 nm
Explanation
Option C is correct.The diameter of a thin filament in a sarcomere is about 7-8 nanometers. The thin filament is made up of a protein called actin. Actin is a long, thin protein that is made up of two strands that twist around each other. The thin filament is arranged in a double helix along the center of the sarcomere.
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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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