Structural Organisation in AnimalsHard
Question
Characteristics of smooth muscle fibres are
Options
A.spindle-shaped, unbranched, unstriated, uninucleate and involuntary
B.spindle-shaped, unbranched, unstriped, multinucleate and involuntary
C.cylindrical, unbranched, unstriped, multinucleate and involuntary
D.cylindrical, unbranched, unstriated, multinucleate and involuntary
Solution
Smooth muscle fibres are spindle-shaped, thick in the middle and thin at either ends, uninucleate no sarcolemma, contraction is slow, involuntary under the control of autonomous nervous system. These muscles are also known as visceral muscles, non-striated, non-skeletal or involuntary muscles.
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