Which of the following statements are correct regarding the skeletal muscle? A. Muscle bundles are held together by collagenous tissue layer called fascicle. B. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions. C. Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins. D. M line is considered as functional unit of contraction called sarcomere. C

Step-by-step solution

Muscle fascicles are held together by a common collagenous connective tissue layer called ligament. The sarcoplasmic reticulum in the muscle fibers resembles a network of smooth endoplasmic reticulums. This Sarcoplasmic reticulum functions as a storehouse of calcium iron. The striated appearance of the skeletal muscle fibre is a result of the distribution pattern of proteins myosin and actin. The sarcomere is responsible for the striated appearance of muscle. The actin is a thin filament and myosin is a thick filam