MUSCLE
SKELETAL MUSCLE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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long, thin and with a one nucleus and one mitochondrion
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short, wide and one nucleus.
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long, cylindrical, multinucleate and many mitochondria
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short, wide, multinucleate and one mitochondrion
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Detailed explanation-1: -Skeletal muscles are made up of long and cylindrical cells. They are multinucleate (having many nuclei) and unbranched. They are also known as striated muscles because they have alternate dark and light bands. They move as per our will, hence they are categorised as voluntary muscles.
Detailed explanation-2: -It is also called striated muscle because transverse bands, or striations, can be seen in the muscle under the microscope. Skeletal muscle has four major functional characteristics: contractility, excitability, extensibility, and elasticity.
Detailed explanation-3: -The smallest contractile unit of skeletal muscle is the muscle fiber or myofiber, which is a long cylindrical cell that contains many nuclei, mitochondria, and sarcomeres (Figure 1) [58]. Each muscle fiber is surrounded by a thin layer of connective tissue called the endomysium.
Detailed explanation-4: -excitability. contractility. extensibility-they can be stretched. elasticity-they return to normal length after stretching.