Each myofibril has a diameter of

Options

A. `1-2 mm`
B. `0.1-0.2 mm`
C. `0.001 - 0.002 mm`
D. None of the above

Answer

To answer the question about the diameter of each myofibril, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Myofibrils**:
- Myofibrils are the basic rod-like units of a muscle cell (muscle fiber). They play a crucial role in muscle contraction and are composed of repeating units called sarcomeres.

2. **Identifying the Diameter**:
- The question specifically asks for the diameter of a myofibril.

3. **Measurement in Millimeters**:
- The diameter of a myofibril is typically measured in millimeters. According to the information, the diameter ranges from 0.001 to 0.002 millimeters.

4. **Conversion to Micrometers**:
- To express this diameter in micrometers, we can convert millimeters to micrometers (1 millimeter = 1000 micrometers).
- Therefore, 0.001 mm = 1 micrometer and 0.002 mm = 2 micrometers.

5. **Final Answer**:
- Thus, the diameter of each myofibril is between 1 to 2 micrometers (or 0.001 to 0.002 millimeters).

### Final Answer:
Each myofibril has a diameter of 1 to 2 micrometers (0.001 to 0.002 millimeters).

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