Unformatted text preview: 7) Muscle structure and composition (Fig. 12-3) a) T-tubules b) Thick and thin filaments (proteins and arrangements) (Fig. 12-5, 12-6) c) [Do not worry about memorizing line and band designations such as A band, Z disk, M line, etc. but do know sarcomere, myofibril, etc.] d) [Do not worry about memorizing names of proteins in thick and thin filaments other than actin and myosin, troponin and tropomysin] 8) Muscle contraction a) Sliding filament theory of contraction (Fig. 12-8) i) Filaments do not change in length ii) Sarcomeres do change in length iii) “Contraction” refers to force generation in a muscle (muscle can be shortening, staying the same length, or lengthening) b) Crossbridge formation and power stroke (Fig. 12-10) c) Role of Ca++ (Fig. 12-10) d) Animation online (http://www.sci.sdsu.edu/movies/actin_myosin_gif.html) e) Initiation by action potential – excitation-contraction coupling (Fig. 12-11)...
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- Spring '10
- Physiology, Dr. Catherine Loudon