During muscle contraction, myosin cross bridges attach to the active site of which muscle component?

A narrow, prominent ridge of a bone is called:

Calcium ions bind to _______ molecule in skeletal muscle cells.

_________ is a round or oval opening through a bone.

The muscle decreases in muscle length during contraction but tension is the same.

Which of the following affect the strength or force of skeletal muscle contraction?

Group of inherited muscle-destroying diseases where muscles enlarge due to fat and connective tissue deposits, but muscle fibers atrophy.

With muscular dystrophy:

It forms a protective cage around the heart, lungs, and great blood vessels:

Ability to recoil and resume the original resting length.