Q. 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 from the options given below:
A) C and D only
B) A, B and C only
C) B and C only
D) A, C and D only
Explanation
[Solution from source] B and C are correct. Fascicles are held by epimysium/perimysium layers (A as worded is wrong) and the functional unit of contraction is the sarcomere, not the M line (D wrong). Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.