54.Smooth muscles are: A. Involuntary, fusiform, non-striated B. Voluntary, multinucleate, cylindrical C. Involuntary, cylindrical, striated D. Voluntary, spindle-shaped, uninucleate
Option A. Smooth muscles are located in the walls of hollow internal organs and exhibit involuntary contraction. Smooth muscle fibres are spindle-shaped cells, uninucleated and are arranged in parallel lines to form sheets. The absence of light and dark bands make these muscles non-striated.
