L18_NPB_101

8 29a pg 295 7 smooth muscle myosin acnn schemanc

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Unformatted text preview: • Cell has three types of filaments – Thick myosin filaments • Longer than those in skeletal muscle – Thin acNn filaments • Contain tropomyosin but lack troponin – Filaments of intermediate size • Do not directly par2cipate in contrac2on • Form part of cytoskeletal framework that supports cell shape 6 Smooth Muscle Myosin & AcNn • SchemaNc RepresentaNon of the arrangement of Thick and Thin Filaments in a Smooth Muscle Cell In Relaxed State Fig. 8- 29a, pg. 295 7 Smooth Muscle Myosin & AcNn • SchemaNc RepresentaNon of the arrangement of Thick and Thin Filaments in a Smooth Muscle Cell In Contracted State Fig. 8- 29b, pg. 295 8 Ca2+ AcNvaNon of Myosin Cross Bridge Fig. 8- 30, pg. 296 Note: No Troponin 9 Skeletal vs. Smooth Comparison of Role of Calcium In Bringing About ContracNon in Smooth Muscle and Skeletal Muscle Fig. 8- 31, pg. 296 10 Smooth muscle contracNon • Twitch is slower – Cross bri...
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This note was uploaded on 12/07/2012 for the course NPB 101 taught by Professor Fuller,charles/goldberg,jack during the Spring '08 term at UC Davis.

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