The part of the sarcomere in which only myosin is present is termed as:

Options

A. A-Band
B. I-Line
C. M-Line
D. H-Band

Answer

To solve the question regarding the part of the sarcomere in which only myosin is present, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Sarcomere**:
- The sarcomere is the basic contractile unit of muscle tissue. It is composed of thick and thin filaments, which are primarily myosin and actin, respectively.

2. **Identify the Components of the Sarcomere**:
- The sarcomere contains different regions that can be identified based on the presence of myosin and actin filaments.
- The main regions include:
- **A band**: This is the region that contains both myosin and actin filaments.
- **I band**: This region contains only actin filaments.
- **H band**: This is the central part of the A band where only myosin filaments are present, and there are no overlapping actin filaments.

3. **Determine the Region with Only Myosin**:
- Since the question specifically asks for the part of the sarcomere that contains only myosin, we focus on the H band.
- The H band is defined as the area within the A band where there is no actin filament, meaning it consists solely of myosin.

4. **Conclusion**:
- Therefore, the part of the sarcomere in which only myosin is present is termed the **H band**.

### Final Answer:
The part of the sarcomere in which only myosin is present is called the **H band**.