1. Muscle Review

4. Myosin

5. Actin

6. What separates a sarcomere? Z – lines (disc)

7. What is attached to Z-lines? Actin – thin fibers, extend in towards the middle

8. What is in the middle of a sarcomere? Myosin – thick fibers, extend out from the middle A band – dark, middle part of sarcomere that is the entire length of the myosin fibers

9. What is the area of only thin? I band – lighter area that contains ONLY thin fibers, found on ends of sarcomere with Z - line, no overlap of thick and thin fibers

10. What is the area of only thick? H zone – center of A band that contains ONLY thick fibers, no overlap of thick and thin fibers