<prompt> Sarcomere extends betweenA band I bandTwo Z linesTwo I bandsNone  <response>: The area between two adjacent Z lines is called a sarcomere. The thick filaments are lined up to form the A bands, whereas the array of thin filaments extends out of the A band and into the less dense staining I bands.REF.GANONGS REVIEW OF MEDICAL PHYSIOLOGY -23rd EDITION. Page No-95. 