When a skeletal muscle fibre is viewed through a microscope it has a striated appearance with alternating light and dark bands. These striations are due to:

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the fact that the myofilaments are arranged in a highly regular array.

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the regularly spaced terminal cisternae of the sarcoplasmic reticulum.

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the light reflecting properties of the connective tissue surrounding the muscle fibre.

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the regular arrangement of the T-tubules (transverse tubules) running transversely through the muscle fibre.

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When a skeletal muscle fibre is viewed through a microscope it has a striated ap...

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