BIOLOGY 3XL3 Chapter Notes - Chapter 6: Phenotypic Plasticity, Mitochondrial Biogenesis, Hypertrophy
4 Feb 2017
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Document Summary
Shows a degree of phenotypic plasticity changes in response to energetic/environmental stressors. Hypertrophy: increase in muscle mass: both occur primarily by change in size of cells not number of cells. Vegf growing fiber tries to balance nutrients with increase in demand from growth. Angiogenesis: production of blood vessels: number of capillaries and capillaries per fiber ratio increases later. Fiber-type composition changes: more intermediate fibers and less fastest iib fibers due to endurance training more sustained activities. Also increase mitochondrial volume = mitochondrial biogenesis. Fibers (type i) and increase in fast twitch (type ii) Inactive for months without eating, drinking, defecating or urinating. Greatly reduced nitrogenous end-produces (urea, ammonia) in urine and blood: weird inactive should result in a breakdown of proteins whose products are urea and ammonia in humans. Only loose <10% of muscle mass compared to up to 40% for bedridden humans and small hibernators.
