Thin filaments within a muscle fiber are called: A. actin
B. myosin
C. striation
D. sarcolemma
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Thin filaments within a muscle fiber are called: A. actin
B. myosin
C. striation
D. sarcolemma
The correct answer is A. actin.
Thin filaments within a muscle fiber are primarily composed of a protein called actin. These filaments play a crucial role in muscle contraction by interacting with thicker myosin filaments. Together, they form the contractile units of muscle tissue known as sarcomeres. If you have any more questions or need further explanation, feel free to ask!