Question

REVIEW ACTIVITIES Coloring Activity 1. This is a resting sarcomere. Draw vertical lines through the sarcomere to divide it into the regions listed below. 2. Color each region a different color. 3. Draw a contracted sarcomere directly below this sarcomere and continue your vertical lines and coloring scheme to illustrate the changes in the regions. I band H zone Mline Z disc Zone of overlap Bades ° སོ གས་ 09 ༼ས་ op 8 despesa

Answer 1

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  A) Sarcomene in resting muscle M line MOZEOEOEEDS m I Band Z line H-zone II Band Z line Zone of overlap B) Saucomere during contraction M line 0 2030 20 I Band H-zone Į I Band Lone of overlap 2 line.
  During contraction of the muscle ,the actin filaments glide between the myosin filaments towards the center of the H zone and approach the corresponding actin filaments from the next Z line.
• The Z line approach the ends of the myosin filaments . That's why the H zone and I bands are shortened during contraction of the muscle .
• During relaxation of the muscle , the actin filaments and Z lines come back to the original position.