Once the Contraction (Cross Bridge) Cycle begins, both ________ and ______________ are required for the cycle to continue.

The first phase in a muscle twitch is the _______ phase, and the _______ phase is longest in duration.

Which of the following can NOT be utilized during muscle contraction?

When describing the internal organization of a sarcomere, which of the following describes an area of the sarcomere that includes the thick filament with no overlap of the thin filaments?

The quadriceps include all but the ______.

Which of the following events occurs during muscle contraction?

Which generalization concerning the movement by skeletal muscles is not true?

Which of the following is NOT a correct function of skeletal muscle?  

The serratus anterior is named according to:

Muscles can be classified into three functional groups.  In which group would a muscle that has the primary responsibility of creating a particular movement be classified?