APK 2100C Lecture Notes - Lecture 10: Troponin, Titin, Axon Terminal
12 Jan 2018
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Textbook pages and questions: read 241-255, #1, 2, 3, 5 on pg 260. If you damage a tendon its considered a strain: origin by direct attachment = looks like muscle just attaches directly to the bone. Insertion by indirect attachment = where there"s a noticeable amount of tendon attaching the muscle to the bone: sprain = damaged ligaments. Line (m line: runs down a band, ends of sarcomere is actin myofilament in i and a band (mostly i band, z disc in middle of i band zig-zag appearance. I band: titan, actin, z disc, never myosin, muscle fascicles muscle fibers myofibrils sarcomeres myofilaments. In a-i band (connection: brief overview of muscle contraction, sliding filament mechanism of contraction, actin slides along myosin towards midline. High (not as high as type 1, need some oxygen) Myoglobin content (contributes to red color, functions to bind oxygen) Walking, sprinting: fiber type distribution, your muscles have a mixture of fiber types.
