Which one of the following statements is incorrect?

Options

A. Heart muscles are striated and involuntary
B. The muscles of hands and legs are striated and voluntary
C. The muscles located in the inner walls of alimentary canal are striated and involuntary
D. Muscles located in the reproductive tracts are unstriated and involuntary

Answer

To determine which statement is incorrect regarding muscle types, let's analyze each statement one by one:

1. **Statement 1**: "Heart muscles are striated involuntary."
- **Analysis**: Heart muscles, also known as cardiac muscles, are indeed striated and involuntary. This statement is correct.

2. **Statement 2**: "Muscles of hands and legs are striated involuntary."
- **Analysis**: The muscles in the hands and legs are skeletal muscles, which are striated and voluntary. This statement is incorrect as it describes them as involuntary.

3. **Statement 3**: "Muscles located in inner walls of the elementary canal are striated and involuntary."
- **Analysis**: The muscles in the inner walls of the elementary canal are smooth muscles, which are non-striated and involuntary. This statement is incorrect because it incorrectly categorizes smooth muscles as striated.

4. **Statement 4**: "Muscles located in reproductive tracts are striated and involuntary."
- **Analysis**: The muscles in the reproductive tracts can be smooth (non-striated) and involuntary. However, some striated muscles may also be present. This statement is generally considered correct, depending on the context.

Based on the analysis, the statements that are incorrect are:

- **Statement 2**: Muscles of hands and legs are striated involuntary. (This is incorrect; they are striated and voluntary.)
- **Statement 3**: Muscles located in inner walls of the elementary canal are striated and involuntary. (This is incorrect; they are non-striated and involuntary.)

However, since the question asks for one incorrect statement, the most clear-cut incorrect statement is:

**Final Answer**: Statement 3 is incorrect.

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