Question

The component of a muscle fibre known as sarcolemma functions as

• A. A contractile myofilament
• B. A chemical at the synapse
• C. A cross bridge unit on the myosin
• D. A plasma membrane covering each cell

Answer 1

The correct option is D A plasma membrane covering each cell

A sarcomere is the basic unit of muscle tissue in both cardiac and skeletal muscle. The fine transparent tubular sheath which envelope the fibres of skeletal muscles. Myofibril activity is required for muscle contraction on the molecular level. When ATP binds to myosin, it separates from the actin of the myofibril, which causes a contraction.

So, the correct option is 'a plasma membrane covering each cell'.