What is a sarcomere and what is its function? I- A sarcomere is the smallest portion of the muscle fiber with the ability to contract and distend....
What is a sarcomere and what is its function?
I- A sarcomere is the smallest portion of the muscle fiber with the ability to contract and distend.
II- The distribution of actin and myosin filaments varies along the sarcomere.
III- A sarcomere comprises the segment between two consecutive Z lines and is the contractile unit of the muscle fiber.
I- A sarcomere is the smallest portion of the muscle fiber with the ability to contract and distend.
II- The distribution of actin and myosin filaments varies along the sarcomere.
III- A sarcomere comprises the segment between two consecutive Z lines and is the contractile unit of the muscle fiber.
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A alternativa III está correta. O sarcomero é a unidade contrátil do músculo esquelético e é composto pela região entre duas linhas Z consecutivas. A distribuição de filamentos de actina e miosina varia ao longo do sarcomero, mas não é a sua função principal.
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