An unknown drug (Agent X) appears to block depolarization of the membrane.  How might this drug work?

Schwann cells wrap nerves in the ________ forming the myelin sheath.  This allows nerves to use saltatory conduction, where ion channels open at the ___________.

A bundle of muscle fibers is called:

TRUE or FALSE: When muscles contract, the A band shortens.

The epimysium is deep to the endomysium.

The perimysium covers the muscle.

Tonight you go out to celebrate finishing your exam.  As you digest a large meal, the ________branch of the _______nervous system is most active.

Which of the following muscle groups would have smaller motor units?

Smooth muscle is striated.

Inside the muscle, depolarization causes the ____________________________________ to release calcium during skeletal muscle contraction.