The major source of calcium for contraction of skeletal muscle is:
Ans. D. sarcoplasmic reticulum (SR)Skeletal muscle depends on the SR as the major source of calcium. Cardiac muscle and smooth muscle depend on influx of calcium from ECF and Ca-induced calcium release for contraction.
ECF
Cytosol
Mitochondria
Sarcoplasmic reticulum (SR)
General