This muscle is used for smiling since it draws the angle of the mouth upward and laterally for laughing:

Which muscle tissue contracts only in response to nerve stimulation?

In skeletal muscle, alternating light and dark bands are termed __________________. 

Cerebrospinal fluid (CSF) fills in the space between the:

In skeletal muscle, alternating light and dark bands are termed __________________. 

The bundle of nerve roots that occupy the vertebral canal from L2 to S5 is called the: 

This muscle is used for smiling since it draws the angle of the mouth upward and laterally for laughing:

The longest muscle in the body is the:

Cerebrospinal fluid (CSF) fills in the space between the:

In a relaxed muscle fiber, the active sites of actin are blocked by _____________.