This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: by VEGF (vascular endothelial growth factor) ♦ Density of mitochondria ↑ (2) Resistance training ♦ hypertrophy: actin & myosin synthesis (myofibrils ↑) ♦ FG b FO fibers B. Atrophy: muscle not in use ♦ by denervation, tenotomy (cutting the tendon), immorbilization, microgravity, etc. ♦ few SO (type I) fibers ♦ muscle atrophy with age (= sarcopenia) ♦ exception: hibernating black bears & aestivating Australian frogs b no disuse atrophy How? Aerobic mitochondria b ROS b cell damage SOD -ROS: reactive oxygen species (e.g. H 2 O 2 ) SOD: superoxide dismutase...
View Full Document
- Spring '09
- muscle atrophy, locust flight, Aerobic mitochondria ROS, Aplysia gill withdrawal, training FO fibers