Question

Why white fibres have lot of sarcoplasmic reticulum?

Answer 1

Answer:

White muscle fibres are designed for quick movements like the muscles in your hands & for moving your eyes.

Due to this they need more sarcoplasmic reticulum so that they are better equipped for quick release and re-uptake of calcium ions.

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Answer 2

Answer:

White muscle fibres are designed for quick movements (like the muscles in your hands & for moving your eyes). Also they are used for high energy activity for short periods of time. Due to this they need more sarcoplasmic reticulum so that they are better equipped for quick release and re-uptake of calcium ions.

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