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Which of the following is the characteristics of striated muscles?
cylindrical, branched and multinucleate
spindle-shaped, unbranched and multinucleate
spindle-shaped, unbranched and uninucleate
cylindrical, unbranched and multinucleate
cylindrical, unbranched and multinucleate
Striated muscles (also known as skeletal or voluntary muscles) are attached to bones and are responsible for voluntary body movements. Under a microscope, they appear cylindrical, unbranched, and multinucleate (contain multiple nuclei per cell) with distinct alternate light and dark bands (striations).
Striated muscles (also known as skeletal or voluntary muscles) are attached to bones and are responsible for voluntary body movements. Under a microscope, they appear cylindrical, unbranched, and multinucleate (contain multiple nuclei per cell) with distinct alternate light and dark bands (striations).
Think of striated muscle fibers like bundles of striped cables made of multiple strands working together under conscious control to lift heavy objects.
SUM: Striated, Unbranched, Multinucleate.
Muscle structure = Cylindrical + Unbranched + Multinucleate
Striated muscle fibers are composed of long, cylindrical cells enclosed by a sarcolemma. Each fiber contains multiple peripheral nuclei due to the fusion of myoblasts during embryonic development. The repeating contractile units called sarcomeres give them their characteristic striated appearance.
Striated muscles are attached to the skeleton (skeletal muscles).
They show alternating dark (A bands) and light (I bands) cross-striations.
Cells are multinucleate, meaning they possess multiple nuclei located at the periphery.
They are under voluntary control (moved consciously by will).
Allows rapid and powerful voluntary contractions for locomotion.
Prone to fatigue with prolonged continuous use due to lactic acid accumulation.
Movement of limbs, bones, and facial expressions.
Breathing movements (diaphragm and intercostal muscles).
Smooth muscles are spindle-shaped, unbranched, and uninucleate.
Cardiac muscles are cylindrical, branched, and uninucleate with intercalated discs.
D is correct — striated muscles are cylindrical, unbranched, and multinucleate.
Always differentiate between the three muscle types based on three criteria: shape (cylindrical vs spindle), branching (branched vs unbranched), and nuclei count/position (uninucleate vs multinucleate).
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