Question

The structural and functional unit of the striated muscle fibre is called as

• A. Sarcolemma
• B. Sarcomere
• C. Sarcoplasm
• D. Myofibril

Answer 1

The correct option is B Sarcomere

• The sarcolemma is the cell membrane of a striated muscle fibre cell.
• The sarcoplasm of a muscle fibre is like the cytoplasm of other cells and it houses large amounts of glycosomes.
• A myofibril is a basic rod-like unit of a muscle. Myofibrils comprise of repeating sections of sarcomeres.
• These sarcomeres appear as alternating dark and light bands under the microscope and are responsible for muscle contractions. Hence, considered the structural and functional unit of the striated muscle fibre.

Thus, the correct answer is option B.