<prompt> The so-called pseudo-H zone in a sarcomere is:M line plus lighter areas on its either sideNot seen normally in a sarcomereSeen only in an extremely contracted state of a muscleDisappearance of H band during contraction  <response>: At the very center of the sarcomere, there is H-zone the gap between the ends of the thin filaments. The dark line at the center of the H-zone is called M-line. This dark M-line plus the light areas on either side constitutes the pseudo-H zone. 