Can someone answer these for me please

1. The sarcomere extends from one ___________to the next.
2. The______appears darker because the thick myosin filaments run its entire length.
3. The_______appears lighter because no thick filaments are present.
4. The lighter stripe in the middle of the A band is called the_____. It is visible only in a relaxed muscle fiber.
5. The______is in the center of the sarcomere and serves as an attachment site for the thick filaments