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

When acetylcholine binds to a receptor, it makes ___________move into the muscle during skeletal muscle contraction.

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

The epimysium is deep to the endomysium.

The area of the sarcomere where there are only actin filaments is the:

When a nerve impulse reaches a muscle cell, the muscle cell contracts.  If a second nerve impulse reaches a muscle cell before the cell relaxes this will lead to a stronger muscle cell contraction.  This process is called:

Adductors move a body part toward the midline.

A muscle which becomes greatly enlarged in ballet dancers because of the need to flex and abduct the thigh and which supports the knee laterally is the:

Which of these muscles is named according to its function?

When describing the internal organization of a sarcomere, which of the following describes an area of the sarcomere that represents the middle line of the sarcomere?