Which of the following muscle fibres do not show striation and taper at both ends?

Options

A. Cardiac muscle fibres
B. Smooth muscle fibres
C. Skeletal muscle fibres
D. Voluntary muscle fibres

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which type of muscle fibers do not show striation and taper at both ends.

2. **Identify Muscle Fiber Types**: The options provided are:
- Cardiac muscle fiber
- Smooth muscle fibers
- Skeletal muscle fibers
- Voluntary muscle fibers

3. **Analyze Each Option**:
- **Cardiac Muscle Fiber**: These fibers are striated and are not tapered at both ends. They are involuntary but do not fit the criteria of being non-striated or tapered.
- **Smooth Muscle Fibers**: These fibers do not show striations (they are non-striated) and they do taper at both ends. They are also involuntary.
- **Skeletal Muscle Fibers**: These fibers are striated and are not tapered at both ends. They are voluntary.
- **Voluntary Muscle Fibers**: This term generally refers to skeletal muscle fibers, which are striated and not tapered.

4. **Conclusion**: Based on the analysis, the only muscle fibers that do not show striation and taper at both ends are the **smooth muscle fibers**.

5. **Final Answer**: The correct answer is **smooth muscle fibers**.

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