1. Muscle Tissue Chapter 10

2. Functions • Produce movement • Maintain body posture and positioning • Soft tissue support • Guard entrances and exits • thermoregulate

3. Skeletal Muscle Features • Derived from myoblasts • Muscle fiber is a muscle cell • Skeletal muscle fibers extend the length of the muscle • Multinucleate • Plasma membrane is called the sarcolemma • Cytosol is called the sarcoplasm • Transvers (T) Tubules transmit action potentials to interior of muscle fiber • Sarcoplasmic reticulum (smooth ER) is specialized to store Ca2+ • Connective tissue coverings

4. Organization of Skeletal Muscle

5. Organization of Skeletal Muscle Muscle fiber myofibril myofilament actin & myosin

6. Sarcomere • Contractile unit of muscle • Specialized arrangement of actin and myosin

7. Myofilaments

8. Organization Overview

9. Sliding Filament Theory

10. Overview of Contraction

11. Neuromuscular Junction

12. Active Site

13. Excitation Contraction Cycle

15. Muscle Tension

16. Muscle Twitch

17. Motor Unit Recruitment

18. Isotonic Contractions

19. Isometric Contraction

20. Muscle Metabolism

21. Muscle Performance

22. Cardiac & Smooth Muscle

23. Overview of Muscle Types