PHYSIOLOGY
MICROSCOPIC MUSCLE ANATOMY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cardiac Muscle
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Skeletal Muscle
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Smooth Muscle
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None of the above
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Detailed explanation-1: -Skeletal muscle fibers are cylindrical, multinucleated, striated, and under voluntary control. Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles.
Detailed explanation-2: -Cardiac muscle and skeletal muscle are both composed of sarcomeres. This layout gives both muscle types a striated appearance, alternating dark bands of myosin with lighter bands of actin. Only cardiac muscle has intercalated discs and skeletal muscle is the only type that is multinucleated.
Detailed explanation-3: -Skeletal muscles are composed of myofibrils, which in turn are composed of repeated units called sarcomeres. The skeletal muscles are formed by a process of myogenesis by the fusion of several uninucleate cells. Skeletal muscles are therefore multinucleate entities.