KINE 4010 Lecture Notes - Lecture 20: Myosatellite Cell, Mitochondrial Biogenesis, Protein Isoform
2 Mar 2018
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Document Summary
We can micro dissect fibers now, tease out individual fibers from slides and identify some biochemical characteristics of those fibers using microscopic techniques. Forgot to mention size matters in recruitment of motor units, motor units are recruited according to size called the size principle, means smallest are recruited first bigger recruited second biggest recruited third. Small motor units lower force production, big motor units have highest force production. Higher in type 1 cuz of more mito higher capillary to fiber ratio and higher intramuscular triglyeride which is a source of lipid for fat metabolism. Iix high glycolytic enzyme, glycogen and amount of pcr. People with high type ii fiber percentage more inclined to be prone to risk factors for cardiovascular and metabolic diseases. Higher type i fibers lower risk of these diseases. More capillary to fiber ratio in type i fiber so more blood vessels to support distribution of flow.
