Indicate which bands are being described in each statement by writing the appropriate letter(s) in the blank using the answer code below (more than one answer may apply):
-Shortens during muscle contraction.

Question

Quizplus · Accepted Answer

The I band shortens during muscle contraction because it contains only thin filaments (actin) which slide over the thick filaments (myosin) toward the center of the sarcomere, causing the sarcomere to contract. The A band remains the same length and the H zone shortens or disappears depending on the degree of contraction.

Indicate Which Bands Are Being Described in Each Statement by Writing