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The distance or length of the myofibril ...

The distance or length of the myofibril between two adjacent z-bands is called

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**Step-by-Step Solution:** 1. **Understanding Myofibrils**: Myofibrils are the basic rod-like units of a muscle cell. They are composed of long chains of sarcomeres, which are the functional units of muscle contraction. 2. **Identifying Z Bands**: Z bands (or Z lines) are the boundaries of each sarcomere. They are the points where actin filaments are anchored. 3. **Defining Sarcomere**: The sarcomere is defined as the segment of myofibril that lies between two adjacent Z bands. It is the smallest functional unit of muscle contraction. 4. **Conclusion**: Therefore, the distance or length of the myofibril between two adjacent Z bands is called a sarcomere. **Final Answer**: The distance or length of the myofibril between two adjacent Z bands is called a **sarcomere**. ---
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