General Science • BiologyMedium
What is the primary site of calcium ion storage within striated skeletal muscle fibers, playing a key role in muscle contraction?
A. Sarcoplasmic reticulum✓ Correct Answer
B. Golgi apparatus
C. Endoplasmic reticulum
D. Lysosome
💡 Solution & Explanation
The sarcoplasmic reticulum functions as the specialized intracellular storehouse for calcium ions within skeletal muscle fibers, releasing calcium to trigger muscle contraction upon neural stimulation. Calcium reuptake back into this reticulum causes muscle relaxation.
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