PHYSIOLOGY
SMOOTH MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cells with circular form
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Cells with cylindrical form
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With rectangular form
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Cells in form of spindle
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Detailed explanation-1: -Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles. Cardiac muscle has branching fibers, one nucleus per cell, striations, and intercalated disks. Its contraction is not under voluntary control.
Detailed explanation-2: -Muscle cells are spindle shaped because it help them to align properly over one another and also it make easy for them to contract and relax while movement of the body parts.
Detailed explanation-3: -Smooth muscle fibres are unbranched and spindle in shape. They are unstriated and consist of a single nucleus. These muscles are present in the lining of several internal organs as they perform involuntary actions.
Detailed explanation-4: -Smooth muscle derives from both mesoderm and neural crest cells; this is because smooth muscle contributes to many different tissues throughout the body. One unique feature of neural crest cells is that their migration occurs during embryological development.