Lecture 7

Lecture 7 - Sunday 6-9 Peterson 108 Lecture 7: Effectors...

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Sunday 6-9 Peterson 108 Lecture 7: Effectors Muscle I) Vertebrate muscle types a. Smooth muscle- lines blood vessels a.i. Organs under autonomic control a.i.1. Controlled by peripheral nervous system (unconscious, autopilot) b. Cardiac muscle- heart c. Striated muscle- skeletal muscle (eg limbs) c.i. Under voluntary control c.ii. Makes up most of body mass II) Skeletal muscle a. Tissue a.i. Individual muscle fibers a.i.1. 10-150 mm in diameter a.i.2. Multinucleated a.i.3. Tendon connects to bone b. Muscle Fiber b.i. Fiber contains 4-20 myofibrils in cytoplasm b.ii. Neural muscular junction b.iii. Motor axons c. Myofibril c.i. 1 micron diameter c.ii. Muscle Contraction c.ii.1. Z lines get closer c.ii.2. c.ii.3. A bands remain the same III) Sliding Filaments a. Filament structures a.i. Actin Filaments a.i.1. 50 anstrums diameter a.i.2. Polymers of globulan subunits a.ii. Myosin filaments a.ii.1. 100 A diameter a.ii.1.a.1.5 microns long b. Molecular Mechanism
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Lecture 7 - Sunday 6-9 Peterson 108 Lecture 7: Effectors...

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