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Characteristics of smooth muscle fibres are (a) spindle-shaped, unbranched, nonstriated, uninucleate and involuntary (b) spindle-shaped, unbranched,...

Characteristics of smooth muscle fibres are

(a) spindle-shaped, unbranched, nonstriated, uninucleate and involuntary

(b) spindle-shaped, unbranched, unstriped, multinucleate and involuntary

(c) cylindrical, unbranched, unstriped, multinucleate and involuntary

(d) cylindrical, unbranched, striated, multinucleate and voluntary.

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Answer #1

Spindle-shaped, unbranched, nonstriated, uninucleate and involuntary

Smooth muscle is non-striated It is capable of synchronous contractions that are based on a similar mechanism to the one in skeletal muscle. The cells appear as elongated spindles, or fusiform-shaped. Smooth musculature is found in (almost) all organ system such as hollow organs (e.g. stomach, bladder), in tubular structures (e.g. vessels, bile ducts), in sphincters, in the uterus, in the eye etc. In addition it plays an important role in the ducts of exocrine glands.

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