How many thin filaments are arrayed around each thick filament within a sarcomere?
Correct answer: C. 6
- A. 2
- B. 4
- C. 6
- D. 8
Explanation
Option A: This option is incorrect as well. The number of thin filaments surrounding each thick filament in a sarcomere is greater than four. Option B: This option is incorrect as well. The number of thin filaments surrounding each thick filament in a sarcomere is greater than four. Option C: Within a sarcomere, there are six thin filaments arranged around each thick filament. The thin filaments are composed of actin and are responsible for interacting with the thick filaments during muscle contraction. Option D: This option is incorrect. The number of thin filaments surrounding each thick filament in a sarcomere is not eight.
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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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