Which muscle is striated and involuntary ?

Options

A. Cardiac muscle
B. Skeletal muscle
C. Visceral muscle
D. Smooth mascle

Answer

To answer the question "Which muscle is striated and involuntary?", we can break down the information as follows:

### Step-by-Step Solution:

1. **Understanding Muscle Types**:
- There are three main types of muscles in the human body: cardiac muscles, skeletal muscles, and smooth muscles.

2. **Defining Striated Muscles**:
- Striated muscles are characterized by a striped appearance (striations) when viewed under a microscope.

3. **Identifying Involuntary Muscles**:
- Involuntary muscles are those that operate without conscious control. This means their actions are automatic and not under our will.

4. **Analyzing Each Muscle Type**:
- **Skeletal Muscles**: These are striated but are voluntary, meaning we control their movements consciously (e.g., moving our arms or legs).
- **Smooth Muscles**: These muscles are non-striated and involuntary, meaning they function automatically (e.g., muscles in the digestive tract).
- **Cardiac Muscles**: These are striated and involuntary. They are found in the heart and function automatically to pump blood.

5. **Conclusion**:
- The muscle that is both striated and involuntary is the **cardiac muscle**.

### Final Answer:
The muscle that is striated and involuntary is the **cardiac muscle**.

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