BIO 3303 Lecture Notes - Lecture 5: Choline, Swim Bladder, Neuromuscular Junction
31 Jan 2018
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Exam teaser for the optimal sarcomere overlap length. Remember calcium needed to open myosin actin attachment sites. Slow twitch has highest efficiency at a low velocity. White muscle on outside, red on inside, very categorized. Remember there is a range of myosin isoforms, this is a simplification. Lots of energy quick but gets tired quick. Not as much bang for buck but can go for a while. Combine all types in one muscle group for a mix of everything. Uses that red muscle on the side to swim. Will use the white muscle additively to move quick. View the graph, the output is smaller in red muscle. On the right, the red muscle is turn on. In mammals it"s usually a heterogeneous mix instead of sections of white and red. In a mitochondrial stain, darker is more mitochondria. Can observe which myosin by staining using antibodies. Use the stains to learn the distribution and function of fibers in the muscles.
