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Characteristics of smooth muscle fibres are

1. spindle-shaped, unbranched, unstriated, uninucleate and involuntary
2. spindle shaped, unbranched, unstriped, multinucleate and involuntary
3. cylindrical, unbranched, unstriped, multinucleate and involuntary
4. cylindrical, unbranched, striated, multinucleate and voluntary

Correct answer: spindle-shaped, unbranched, unstriated, uninucleate and involuntary

Solution

Smooth muscle fibres are characterized by their spindle-shaped appearance, lack of striations, and multinucleate nature. They are also involuntary, meaning they do not have control over their contractions.

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