Question

What is the main component of the thin filaments in muscle fibers and is responsible for muscle contraction?

Answer 1

The muscle fibers that attach to your bones have two main parts: thick filaments and thin filaments. The thick filaments are made up of the protein molecule myosin and thin filaments are made up of the protein molecule actin.

Actin. Actin is your answer.

Answer 2

Actin Protein

Step-by-step explanation:

Protein named “Actin” is the main component of thin filament in muscles. There are some other proteins such as troponin and tropomyosin that forms the thin filament. However, actin plays an important role in the contraction of muscles as each actin molecule consists of single myosin binding site. All actin molecules join together to form a chain twisted into helix configuration which is very essential for the contraction mechanism in muscles.