Sarcomere is the part between two

Options

A. H-lines
B. A-lines
C. I-lines
D. Z-lines

Answer

**Step-by-Step Solution:**

1. **Understanding Sarcomere**: A sarcomere is defined as the basic structural and functional unit of striated muscle tissue. It is the segment of muscle fibers that contracts during muscle movement.

2. **Identifying the Boundaries**: The sarcomere is specifically the region between two Z lines. The Z line (or Z disc) serves as the boundary for each sarcomere.

3. **Components of Sarcomere**: Within the sarcomere, there are different regions:
- The **A band**: This is the central part of the sarcomere that contains thick filaments (myosin).
- The **I band**: This consists of thin filaments (actin) and is located on either side of the A band. The I band is divided into two halves by the Z line.

4. **Conclusion**: Therefore, the sarcomere is the part between two Z lines.

5. **Final Answer**: The correct answer is that the sarcomere is the part between two **Z lines**.

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