Which of the following statements are correct regarding skeletal muscle?A. Muscle bundles are held together by collagenous connective 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.Choose the most appropriate answer:
- AA, B and C only
- BB and C only
- CA, C and D only
- DC and D only
Solution & Step-by-step Explanation
A is correct: Fascicles are the bundles; the tissue wrapping them is the fascia.B is correct: The SR stores .C is correct: The alternating bands of these proteins create striations.D is incorrect: The functional unit is the sarcomere, which is the portion between two Z-lines.Statements A, B, and C are correct.