CH. 8 Muscular System Quiz

Which of the following forms cross-bridges with actin?

• Sarcoplasmic reticulum

• T tubules

• Myosin

• Sarcolemma

The orbicularis oris muscle

• surrounds the mouth.

• flexes the head.

• is the smiling muscle.

• closes the eye.

Which of the following is not a facial muscle?

• Orbicularis oculi

• Zygomaticus

• Sternocleidomastoid

• Frontalis

Which muscle is located on the posterior area of the body?

• Latissimus dorsi

• Pectoralis major

• Quadriceps femoris

• Sternocleidomastoid

Which group of muscles is located on the posterior thigh?

• Rotator cuff muscles

• Quadriceps femoris

• Hamstrings

• Muscles of mastication

The rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius

• insert on the calcaneus.

• flex the leg at the knee.

• are antagonistic to the quadriceps femoris.

• are the muscles of the quadriceps femoris.

Which flat muscle covers the forehead and raises the eyebrows (for a “surprised” look)?

• Frontalis

• Zygomaticus

• Masseter

• Buccinator

The smiling muscle is the

• buccinator.

• zygomaticus.

• frontalis.

• orbicularis oris.

Which muscles are located between the ribs and help move the rib cage during breathing?

• Diaphragm

• Sternocleidomastoid

• Serratus anterior

• Intercostal muscles

Which muscle is located in the lower extremities?

• Peroneus longus

• Latissimus dorsi

• Serratus anterior

• Pectoralis major