Exam 9: Muscular System

Which of the following is a series of contractile units that make up each myofibril;each unit extends from Z line to Z line?

With regard to skeletal muscle contraction,which event comes first?

The biceps femoris,semitendinosus,and semimembranosus

Where is the vastus lateralis located?

This muscle lies along the posterior surface of the upper arm;it extends the forearm and is used to bear weight in crutch walking.

"Pumping iron" is most likely to cause

This group of muscles moves the arm at the shoulder.

This large muscle extends the thigh at the hip.

The quadriceps femoris group and the hamstrings

The brachialis and brachioradialis

This flat muscle covers the forehead and raises the eyebrows (for a "surprised" look).