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Structural Organisation in Animals question

2016 · Q56
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Structural Organisation in Animals question

2016 · Q56

NEETBiologyStructural Organisation in AnimalsMCQ+4 / −1
Smooth muscles are
  1. A
    involuntary, cylindrical, striated
  2. B
    involuntary, fusiform, non-striated
  3. C
    voluntary, spindle-shaped, uninucleate
  4. D
    voluntary, multinucleate, cylindrical
View written solutionFree

Correct answer: B

Smooth muscle fibres are elongated and spindle shaped (fusiform). Each fibre contains a single oval nucleus surrounded by cytoplasm (sarcoplasm). In cytoplasm, myofibrils are arranged longitudinally. These fibres lack striations and sarcolemma, however are enclosed by plasma membrane.

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