Muscular P2

What is the specialized plasma membrane of a skeletal muscle cell called?

• Myofibril

• Sarcolemma

• Sarcomere

• Myosin

Which bands give the muscle its striped appearance?

• Light (I) bands and dark (A) bands

• Thick and thin filaments

• Z-discs and M lines

• H zones and M lines

What is the contractile unit of a muscle fiber?

• Myofibril

• Sarcomere

• Sarcolemma

• Actin

What does the I band contain?

• Only thick filaments

• Only thin filaments

• Both thick and thin filaments

• Only myosin

What is the function of myofilaments in the sarcomere?

• Produce energy

• Produce banding (striped) pattern

• Store calcium

• Transport nutrients