Question

During muscle contraction:

• A. Size of A-bands remain the same
• B. Size of H-zone become smaller
• C. Size of I-band decreases
• D. All the above

Answer 1

The correct option is D All the above

During muscle contraction, myosin head pull the actin filaments towards one another, resulting in a shortened sarcomere. During this event, I-band and H-zone will disappear or shorten, whereas length of A-band remains the same.