Chapter 10

1. _________ muscle fibers are large in diameter, fatigue easily, are the main component of “white muscle” and use anaerobic metabolism
6. ____ is required to break the cross-bridge of myosin & actin and allow for muscle relaxation to occur
7. thin filaments of the sarcomere are primarily composed of _________
8. with isotonic ________ contractions, tension is greater than load and the muscle fibers shorten
9. A skeletal muscle cell is also called a skeletal muscle _________
11. the muscles store excess glucose as ________
14. membrane complex that forms a tubular network around each myofibril, stores and releases calcium in the skeletal muscle fiber is the sarcoplasmic __________
15. with ________ contractions, tension develops but fibers stay the same length
16. layer of connective tissue that surrounds the entire skeletal muscle
17. the creatine ________ catalyzes conversion of ADP to ATP using the energy stored in creatine phosphate

2. when calcium binds ________ it changes the shape of the troponin-tropomyosin complex and exposes the active sites on actin
3. when the active sites on actin are exposed, _____ heads can then bind to the actin
4. with anaerobic metabolism, the byproduct _____ acid is produced which can result in muslce fatigue and cramps
5. with ______ contractions,muscle fibers change length and an object is moved
7. __________ metabolism requires oxygen and is used by muscles at rest or with minimal activity
10. layer of connective tissue that surrounds each individual muscle fiber
12. thick filaments of the sarcomere are primarily composed of _________
13. The smallest functional unit of the muscle fiber, made up of myofibrils arranged into repeating units and is responsible for contraction of skeletal muscles