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The I band in the sarcomere is where actin filaments are anchored. It helps maintain the structure of the sarcomere and allows for muscle contraction to occur efficiently.

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What structure anchors actin filaments in a sarcomere?

In a sarcomere, actin filaments are anchored at the Z disc (or Z line). The Z disc serves as the boundary between adjacent sarcomeres and provides a point of attachment for the plus ends of the actin filaments. This structure helps maintain the organization of the sarcomere and plays a crucial role in muscle contraction.


What is the role of the functional unit of a muscle in the process of muscle contraction?

The functional unit of a muscle is the sarcomere, which is responsible for muscle contraction. Within the sarcomere, actin and myosin filaments slide past each other, causing the muscle to shorten and generate force. This process is essential for movement and muscle function.


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End of a sarcomere is marked by?

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