Watch a Video:
Watch the video below and answer the following questions.
1. What is skeletal muscle used for?
2. What controls skeletal muscles?
3. What are individual muscle cells called?
4. Each muscle fiber runs _________.
5. What are the contractile subunits of muscle fibers called?
6. What surrounds the contractile subunits?
7. Where are T tubules?
8. What two filaments make up sarcomeres?
9. What happens when a muscle contracts?