What structure in skeletal muscle cells functions in calcium

What structure in skeletal muscle cells functions in calcium storage? mitochondria intermediate filament network myofibrillar network sarcoplasmic reticulum

Solution

the answer is option D. Sarcoplasmic reticulum. It stores and regulates the calcium level in muscle cells. It has luminal calcium-binding proteins for calcium storage, SR calcium release channels for calcium release and sarcoplasmic reticulum Ca2+ -ATPase pumps for calcium reuptake.