1. Muscle Tissue Upcoming events: muscle tissue today muscle tissue NOT on Exam #1 Exam #1 this Thursday Bring a scantron form & a pencil BE ON TIME!

2. 1. Name this structure 2. Name this structure (be specific) 3. Give one function of the structure in #2 (be specific) 4. List at least 6 movements that the shoulder can make 5. List at least 4 movements that the TMJ can make

3. Muscle Tissue 3 types of muscle tissue basic histology What is a muscle fiber? Connective tissue wrappings types of muscle attachments neuromuscular junction smooth and cardiac muscle

5. skeletal cardiacsmooth

6. Muscle fiber = muscle cell

7. Skeletal muscle fibers are multinucleated Muscle fibers are wrapped with connective tissue

8. Myoblasts fuse Skeletal muscle fibers: multinucleated striated excitable contract extensible elastic wrapped with CT hypertrophy atrophy

10. Tendon Deep fascia Epimysium Epi = upon, above Perimysium Peri = around Endomysium Endo = within Connective tissue wrappings of skeletal muscle Myo, mys = muscle

11. Bellies Insertion Origins Muscle attachments Ligaments: bone to bone Tendons: muscle to bone Direct vs Indirect attachment

12. Aponeurosis Muscle to skin Muscle to muscle via tendon

14. Neuromuscular junction

15. Fig. 10.12(TE Art) Synaptic vesicles (containing ACh) Motor end plate ACh = acetylcholine

16. Fig. 10.15p270a(TE Art) Neuron release ACh Electrical excitation spreads across muscle fiber and down T tubules

17. Ca 2+ Release Calcium Calcium + ATP = muscle contraction Neurotoxins...

18. Rigor Mortis What is rigor mortis? Why do the muscles contract after death? Why do they remain contracted for up to 24 hours? Why does rigor mortis only last 24 hours?

20. Fig. 10.17b

21. Fig. 10.19(TE Art) Muscularis externa Mucosa Circular layer Longitudinal layer Submucosa Epithelium Lamina propria Muscularis mucosae