Calcium is stored in: (A) T tubule, (B) Sarcoplasmic reticulum, (C) Terminal cistern, (D) Golgi apparatus
Answer is B. Calcium is stored in sarcoplasmic reticulum in the skeletal and cardiac muscles Calcium plays a major role in muscle contraction Ref:Guyton and Hall textbook of medical physiology 12th edition,page number: 85 ,86,87