Smooth muscles are

Options

A. involuntary, spindle shaped , uninucleated , tapering
B. voluntary, multinucleate, cylindrical
C. involuntary , cylindrical , multinucleate
D. voluntary , branched, uninucleate .

Answer

### Step-by-Step Solution:

1. **Understanding Smooth Muscles**:
- Smooth muscles are a type of muscle tissue found in various organs and structures within the body. They are called "smooth" because they do not have the striations (stripes) that are characteristic of skeletal muscles.

2. **Identifying Muscle Types**:
- Muscles can be classified into three types: skeletal, cardiac, and smooth. Skeletal muscles are voluntary and striated, cardiac muscles are involuntary and striated, and smooth muscles are involuntary and non-striated.

3. **Involuntary vs. Voluntary**:
- Voluntary muscles are those that can be controlled consciously (e.g., skeletal muscles). In contrast, involuntary muscles operate without conscious control (e.g., smooth muscles). Smooth muscles are controlled by the autonomic nervous system.

4. **Shape of Smooth Muscle Cells**:
- Smooth muscle cells are described as spindle-shaped, meaning they are wider in the middle and taper at both ends. This is different from cylindrical cells, which would be uniform in width.

5. **Nucleus Count in Smooth Muscles**:
- Smooth muscle cells are typically uninucleated, meaning each cell contains a single nucleus. This is different from skeletal muscle cells, which are multinucleated.

6. **Conclusion**:
- Based on the characteristics discussed, smooth muscles are involuntary, spindle-shaped, and uninucleated. Therefore, the correct description of smooth muscles is that they are involuntary, spindle-shaped, and uninucleated.

### Final Answer:
Smooth muscles are involuntary, spindle-shaped, and uninucleated.